a -lt"' ~ ±i6J ~/.e'~.:k·i~t
Transactions and Proceedin~sof thePalaeontological Society of Japan
New Series

No. 45

Palaeontological Society of Japan
April lOth, 196~

CONTENTS
TRANSACTIONS
Page·122. Cretaceous Planktonic Foraminifera from the 1liddle Yezo Group of the
Ikushumbctsu, l'vliruto and Hatonosu Areas, Hokkaiclo ................. .
. . . . . . . . . . . . . . . . . . . . . . . . . . Yokichi TAKAYA;o.;AGI and I-lisaichi lWAl\IOTO 183

423. Discovery of the Fossil Giant Salamander (Jlegalobatraclws) in Japan ....
197
42·1. Dasybatus from the japanese \Eocene .. Kotora HATAI and Tamio KOTAKA 201
425. On the Eocene Plants from the Woodwardia Formation of the lshikariGroup ...................................................... Seido ENDO 206
426. Eocene Planktonic Foraminifera from Haha-jima (Hillsborough Island) ....
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Tsunemasa SAITO 209
PROCEEDINGS ................................................................ 226. . . . . . . . . . . . . . . . . . . . . . . . . . . . Tokio SHIKAMA and Yoshikazu HASEGA\VA

President: Teiichi KoBAYASHI
Councillors: Kiyoshi ASA:\0 (Editor of ··Fossils"), Riuji EI"DO (Planning), Haruyoshi
FUJL\IOTO, Shoshiro l-IANZAWA, 'Vataru lL\SHEviOTO (Treasurer), Kotora IIATAI,
lchiro IIAYASAKA, Koichiro ICHIKAWA, Nobuo !KEBE, Teiichi KOBAYASHI,
Tatsuro l'vlATSU:'IIOTO, Masao MIKATO. Tokio SHIKAJ\IA (General Affairs), Fuyuji
TAKAI (Editor). Ryuzo TORIY.-\'.1.\
Secretary: Tetsuro HAN AI
Assistant Secretary: Takeo ICIIIKA \VA

All Communications relating to this journal should be addressed to the
PALAEONTOLOGICAL SOCIETY OF JAPAN
Geological Institute, Faculty of Science, University of Tokyo, japan

Trans. Proc. Palaeont. Soc. Jap:m. N. S., No. 45, pp. 183-196. Pl. ~8. April 10, 1962

422.

CRETACEOUS PLANKTONIC FORAMI~IFERA FROM THE
MIDDLE YEZO GROUP OF THE IKUSHUMBETSU.
\1IRUTO. AND HATONOSU AREAS. HOKKAIDO*YOKICHI TAKAYANAGI
Institute of Geologr and Paleontology, Tohoku UniYersity
and

H ISAICHI 1\\" A:\10TO
Technical Institute, Japan Petroleum Exploration Co.

~trl!iii:!~*lJI] • *iliEillt • llfHl-!Jtl!)ljl(O)rjlfii;;L :/JI'HllfO)I~~Vl~ci!J.ihftii.f.}l.!R:

rjrfii;.:c. /J1"illF

riiet.:. 1Hi;; .nt..: 4 1il\ • 1 trr•m~n-e.JC~ L.. ~h-lt-c -t:-tt.~?:.:.ttli <u.r~:if.il~ii.., t.:,ifzi

m 1f w · :¥;;· * rr -macropaleontologie works on this area
have been published. Accordingly it
may be significant to record the Forami·
nifera because they provide a new toolfor interregional correlation. The pre·sent paper on the planktonic Foraminifera is the first of the series concerning the above theme which will be pub·lished separately for convenience.

Preface
In the previous work (TAKA YAl'/1GJ.
1960) the Cretaceous Foraminifera rang·
ing approximately from the Aptian toCampanian in age were investigated.
As the result the stratigraphic andgeographic distributions of those Fo·
raminifera in the meridional zone of
Hokkaido became clear. However sue·cessive work on the Foraminifera fromthe r-.Iiddle Yezo group of the lkushumbetsu. \lliruto and Hatonosu areas result·ed in finding a number of forms hitherto
unknown from the Cretaceous of Hok·kaido. Among the above-mentioned
areas. the lkushumbetsu is a classic
field \\'here YAI:IE (1909) first establishedthe standarcl stratigraphic division of
the Cretaceous System in llokkaido.
Since then, numerous stratigraphic andIntroduction
In the lkushumbetsu area a sequenceof strata which range from the Lower
Cretaceous to Lower Tertiary and form
an anticlinal structure is developed.
The trend of the anticlinal axis is about
NNE to SSW in direction in the north
but about NS in the south. It plunges
southwards. however. Cretaceous strata
reappear in the ~liruto and Hatonosu
areas on the southern extension of theaxis of the plunging anticline. The
sequence of the Cretaceous strata is* Rcc:oived Sept. 29, 1961. read Sept. 23.
1961.

183

18.!

Yokichi T..H\!l V!L\AGI and Hisaiclzi !W.~MOTO

typically seen along the lkushumbetsu
Valley which traYerses from SE to NW
the afore-said anticline. These rocks
were stratigraphically classified into
three major units by YARE (1909. 1926),
namely the Lower Ammonite Beds.
Trigonia Sandstone. and Upper Ammonite
Beds in ascending order. Later a formation in which conglomerate and sandstone predominate \\'as found in theupper stream of a branch of the lkushumbetsu River. and it was assumed
as an equivalent of the Hakobuchi group
lying just above the Cpper Ammonite
Beds. though the exact relationship \\·as
not certain (NACAO. SAITO and ~lATSlJ­
MOTO, 1938 ; FUKADA. ISHII, !CHIKA W A
and S:\I~AKI. 1953). Recently MATSU:\IO·
TO (1954. 1~J59) re,·ised the classificationof authors as follows:

Hakobuchi group ................................ Hakobuchi group-relation uncertain-relation uncertainUpper Yezo group .............................. Upper Ammonite Beds
f..likasa formation ............ Trigonia Sandstone
Middle Yezo group Lower part of the.
,,. J> d.
.ddl y· ....... 1~o\\er ..... mmontte >e s
1\l· 1 c czo groupl

The lower part of the l\liddle Yczo
group which forms the core of the
anticline is here divided into three unitsas Ma. :\lb and 'de in ascending order.
Their lithologic characters in the studied areas arc :Unit
MeLilhofogic chamder
ThiclmessBlack shale. frequently laminated; upper part interbeddedwith thinlayered, gray finegrained sandstone: uppermost
part interbedded with greenish
grey massive sandstone : coarse
materials increase and thickness somewhat reduces southward .......................... 390--330m.
Mb
Bluish grey tine- to mediumgrained sandstone interbeded
with laminated shale in the
middle part: shale layers in·crease in number and thickness
southwards .................. !S0-260m.
MaBlack laminated shale withmarly nodules: thin alternations with tine-grained sandstone in the middle part: sandstone dominate comparatively
northwards ........ approximately 570m.

The unit \Ia coincides with Ia of thedivision by FUKADA et at. (1953) in theIlkushumbetsu Valley, Mb with lb. andMe with Jc and ld. MATSUI\IOTO (1959)
also presented a columnar section taken
along the Jkushumbetsu Valley (theeastern wing\. but the details of his
stratigraphic investigation have not been
published to the present time. Therefore, although he divided the lower partof the lvlicldlc Yezo group into threeunnamed units similar to the present
ones. the exact relationship is not certain. However, he emphasized on theoccurrence of :Hortoniceras (Dumovarites)
sp. in the upper part of his middle unit,
and Graysonites lozoi You:src in the upper part of his basal member of thel\Iikasa formation. because the former
subgenus indicates the upper Upper
Albian and the latter genus the lower
Lower Cenomanian. lienee. in the strict
sense. the Cenomanian/Albian boundary
may be between these horizons but theexact position of the boundary has notbeen ascertained. According to FUKADAet a/., a specimen of 11!ortrmiceras sp.
was collected from their unit ld, though
the result of their paleontological study
has not been published. If it is permitted to lay stress upon this record. it422.

Cretaceous Planktonic Foraminifera from tlze Middle Yezo Group 185

will be most probable that the Cenomanian/Albian boundary will be at thebase of the f\likasa formation.
The samples studied arc all fromthe lower part of the 1\lidclle Yezo
group, and they were collected fromlocalities distributed in the mentioned
areas. In this paper only the plankto·
nic forms are described. They are few
in number and found sporadicallythroughout the whole areas, but seem
to proYide a reliable means for interregional correlation. The types in the pre·sent paper are deposited in the Instituteof Geology and Paleontology. Tohoku
University, and a set of unfigured specimens are also deposited in the TechnicalInstitute of the japan Petroleum Exploration Co .. Tokyo.

permission to publish the present paper.
They \Vish to thank Professor Kiyoshi
ASA:\0 of the Institute of Ceology andPaleontology, Tohoku lnivcrsity for his
guidance, and Professor Kotora HAL\!
of the same institution for his criticism.

Planktonic Foraminifera and their
Age Consideration

Examining the samples from thelower part of the .i'vl iddle Yezo group,
only five forms are found except for theunit .Mb. They are Biticinella ? breggiensis (GANDOLFI). J!edbergel/a delrioensis(CARSEY), Iledbergella troroidea GAJ\DOL·FI). Hedbergel/a trocoidea J'I'Wiflla, n. subsp., and Hedbergel/a tmshitrusis !CARSEY).
but the first mentioned species is notdetected from unit Ida. Their occurrence and frequency are shown in Table
1. and the numbers appearing in thechart arc the number of specimens per
1.

Acknowledgements

The authors are indebted to thejapan Petroleum Exploration Co. for the

Table 1. Distribution of planktonic Foraminifera in the lower part of the
Middle Yezo group of the Ikushumbetsu. Miruto and Hatonosu areas.
----

-

---

Me

:\fa
- - - -,.,., ..,.
0'1
co~~ ;; ;;"' ;:J ~ j ::] ~ tC"' "'
;:!
I
I
I
I
I I I

!. M
lf! L'O,.,.,

Bit icinella ? brcggiensis
Hedbergella delrioensis
Hedbergella trocoidea
HedberKella trocoidea.wzoana, n. subsp.
HedberKella u.·ashitcnsis
total

-:'

4

1

I
M
0'1 0'1 <=> l::: ...,..,. l{2t?; ~M"' MM0>..,. ~ coc-•:1 ;:i~ ,,., ,,., '--"
M
M
"'
"'
,_,
"'
...... "' "' "' "' "'I
I
I"' I"' I I "'I "''I "'I '7

'--"

':'I

-

16 3

2

2
1 1
1

1

-

I

3

'>

:'I

1 22 !J

1

I

I

6

1

1 2
1 2

3 8 6 3 26

-

3

1

1
2 1 3

"./)

2
1 2
4
1 1 1
1 5 5 3 19 1

1
·1

"./)

--

~,

:'I

2

2 10

*The sample localities arc arranged from left to right in ascending order ofstratigraphic sequence.

2
4

1

186

Yokiclzi T4KAYANA.GI and Hisaichi IWAMOTO

100 grams of the original sample. AI·
though taxonomic remarks concerningthese forms are giYen in the next systematic part. their stratigraphic records
are summarized as follows.
Biticinel/a ? breggiensis !originallyAnomalina) was first described from thebasal part of the Scaglia bianca (Albian
to lowest Cenomanian) of Balerna. Can·ton Ticino. Switzerland by GA:-iDOLFI(1942i.
It was successively recorded
from the Vranconian (uppermost Albian)of Djebel Bejaoua, Tunisia (SIGAL, 1956a).
probably the upper Albian strata of:tvladagascar (SIGAL. 1956b), the upper
Albian-Vranconian of central Algeria(Busso:o> et al.. 1956), and the basal~seriesof the "Complexe schisteux intermediaire" (upper Albian) of Forclaz.
near Gruyeres. Canton Fribourg, Switzerland (KLAUS, 1960:•. Thus this species
seems to be confined in its occurrence
to the upper Albian, though it has notbeen recorded outside the Tethys regions.
Hedbergella defrioensis. originally! regarded as a variety of .. Globigerina
cretm·ea ", was described by CARSEY fromthe upper part of the Washita group of
Texas. U.S. A. It was later recognizedin various horizons of the \Vashita andEagle Ford groups (middle Albian toTuronian) (TAPPAN, 19,10, 1913; LOEHLICI!
and TAPPAN. 1951; )Ol'IES, 1960). In
Trinidad BRONNJ:\1:\:\N (1952) found"Globigerina gautierensis ", a juniorsynonym of H delrioensis, from the
Cenomanian to lowest Ivlaestrichtian. andin 1959 BoLLI reaffirmed its occurrencein the l\'laridale, Gautier and the lower
part of the Naparima Hill formations(his zone of Big!obigerine!!a barri. Prae·
globotnmcana rolni. Rolalipora ticinensis
ticinensis, G!obigerina lmsilitensis. Rotali·pora appenninica appenniuica. Globotrun·cana inonzata. and G/obotnmcana renzi

in ascending order). At that time BOLLI
correlated the l'vlaridale formation with
the Fredericksburg and Trinity groupsof the Gulf Coast. Gautier with the
Washita group, and the lower Naparima
Hill with Eagle Ford and lower Austin.
As clearly discussed by LOEBLICH and
TAPA'< (1961), however, it seems to be
most probable that the Gautier and theupper rvlaridale formations are equiyalent
to the Washita group and only the
Rola!ipom appetminica appewzinica zone
is of early Cenomanian age. Concerning
the age of the Globotruncana renzi zone,
BOLI.I assigned it to the Coniacian.
l\loreover J1. defrioensis was recorded
from a submarine core of the Blake
Plateau, north of the Grand Bahama
Island (probably the middle Cenomanian)by LOEBJ.ICII and TAPPAN (1961), andfrom the Lo\\·er Gyliakian (Cenomanian)of Hokkaido (TAKA YANAGI, 1960). "Glo·bigerina cretacea" reported by CRESPI;>;(1953) from the Lower Cretaceous of theGreat Artesian Basin. Australia also
appears to be referable to the present
species. Based upon these records. theoccurrence of this species is mostly concentrated to the Atlantic side of North
and Central America. and ir seems tohave a fairly long range from the upper
Aptian? to Coniacian.
Hedbergella trocoidea is also one of
the species recorded by GANDOLFI (1942)
from the Scaglia variegata (Aptian orAlbian) and the basal pan of the Scaglia
bianca of Balerna. Canton Ticino. Switzer·
land. Cp to the present time it has
been recorded from the following locali·ties: .. Merge! mit Exoten" (Albian} of
Leonstcin, Austria (NOTH. 1951): through·out the "Complexe schisteux intermediaire" (Aptian or lower Albian toupper Turonian) of Gruyeres. Canton
Fribourg, Switzerland (KLAUS, 1960);
two localities of Las Villas Province,

422.

Cretaceous Planktollic Foraminifera from the Middle rezo Group 187

Cuba (BRci:-.~:'\1:\IANN and BROW:-.J, 1956;
they did not give exact stratigraphic
data. but as for the total range they
designated it from the Aptian or Albian
to Cenomanian) ;submarine Blake Plateau.
north of the Grand Bahama Island i probably the middle Cenomanian1 rLoEBLICH
and TAPPAN, 1961). In addition. it wasrecorded from the Cretaceous strata near
New Almaden. California. U.S. A. under
the name of ( ;fobigerina a/madensis CUSH:'viA:-1 and ToDD (19-181. The age of thestrata is recently considered as of the
middle to late Cenomanian 1 LOEBLICII
and TAPI'A:"\. 1961). In this way so far
as concerns the previous records. thisspecies appears to range from the Aptian or Albian to late Turonian in theEuropean and American regions. though
its record from the Turonian is scarce.
I!cdbmgdla washitensis, currently
assumed as a typical Cretaceous Globigerina. was originally from the \Vashitagroup (middle Albian to lowest Cenomanian) of Texas. U.S. A. (CARSEY, 1926).
It has been recorded from many localities of the Washita and Fredericksburg
groups in the Gulf Coast Regions of U.
S. A .. submarine Blake Plateau, Trinidad,
North Africa. western Europe and Hokkaido (TAPP:\:\, 1940, 19,13; LOEBLICH
and T API'i\N, 1949, 1961; SIGAL, 1952;
CIIEYLA:'\, \(;\G:--;f.:, SIGAL and GREKOFF,
1954;
TAK:\YANAG!,
1960;
etc.).
DUBOURDIEU and SIGAL (1949) gave therange of this species from the Albian(Zone of Hoplites tardejurcatus) to the
middle Cenomanian (Zone of _-{cant/wceras
mautellt) in Algeria. Thus it is generally accepted as a marker species for the
Albian to Cenomanian age.
Except for Riticine/la ? breggiensis.
there is no remarkable difference between the assemblages of the units :\Iaand l\k, both consisting of the same
species of /Jedbergel!a. In short the pre-sence of Biticiuella ? brcggiensis in theupper units. l\k, should be marked forage determination. It is noteworthy
that a similar feature was observed in
the subsurface of i\ladagascar by SIGAL(1956b). As already cited by LOEBLICif
and TAPPAN (1961 :. in the Diego-Suarez
region. he found lledbergel!a zmsliitensi.~
in the lower strata (middle or lower
Albian). and Biticinella breggiensis withTicinella roberti (GANDOLFI) in the middle.
and P!anomalina buxtorfi 1 GA:"\DOI.FI' andRotalipora appemzinica 1RE:-\ZJ in the upper. As the last mentioned species isregarded to mark the base of the Cenomanian, the horizon with H. breggiensis
will probably correspond to the unit l\lc.
and the horizon with Hedber~tclla tcashitensis with the unit l'vla. In the same
way the unit Me is correlated with thelower part of the Scaglia bianca lwith
Hiticinel/a? breggiensis) and \Ia with theupper half of the Scaglia variegata ofBalerna. Canton Ticino. Switzerland. In
the Cretaceous of 1-Iokkaido including
the present studied areas. there has been
discovered no such marker species forthe basal Cenomanian as Rotalipora appenninica appemtinica, though it is possible that it will be found in the basal
part of the 1\likasa formation because of
the presence of Graysmzites lozoi. Under
these circumstances. evidence does notstrictly favor correlating the lower partof the Middle Yezo group with the Cretaceous of U.S. A. and Trinidad. But theseparts will possibly be correlated withthe greater part of the Washita group(except for the Grayson formation andits equivalents in the upper part) andthe Fredericksburg group of the Gulf
Coast Region. and also with the larger
part of the Gautier formation (except
for the Rotalipora appenninica appenninicazone) and most of the l\•laridale formationof Trinidad.
Consequently the joint

188

Yoldc/ti T4.!L4. F,-LVAG/ and Hisaichi IWAMOTO

occurrence of the four species will provide solid grounds for correlating thelower part of the !\Iiddle Yezo group of
the studied areas with the strata assigned to be Albian in Europe. Africa. America and their adjacent regions.
Systematic Descriptions

Family Planomalinidae BoLLI. LoEI3LICII
and TAPPA:\. 1957
Genus Biticinella SIGAL. 1956
Biticinella ? breggicnsis ~~GA:"DOLFI). 19·12
Pl. 28. ligur:::s ;a-9c.

Anom:dina breggiensis GA:-:DOLFI. 1942. p. 102.
10~. pi. 3. figs. 6a c. pl. 5. fig. 3. pl. 9. fig.
1. pL 13. figs. 7a-8b. text·fig. 34 (1-4).

Biticinella breggie11sis(G.-\i\DOI.Ft).

StGAI..

l956a. p. 35, 36. tcxt·fig. in p. 35.

Biticinel/a ? breggiengis (GA:-:DOLFI).

KLAt:s.

1960. p. 830. 831. pl. 8. figs. Ga-c.
Hypot,~pcs :-figs. 7a-c. IGPS col!. cat.
no. 75130 from sample Im-125~1: figs.
8a-c. IGPS col!. cat. no. 75131 from sample
Im-12584: figs. 9a-c. IGPS coil. cat. no.
75132 from sample Im-12453.
Size ranges from 0.21 to 0.48 mm. in
maximum diameter.
Remarks :-In the original descrip·tion of this species as an Anomalina.
GANDOLFI Uoc. cit.) displaycdt hree interesting vertical sections in the text
figure. The first section is a form coiled planispirally throughout ; the second
is almost planispiral except for theearliest whorl which is trochospiral; andthe third is trochospiral except for thelast planispiral whorl. In addition, theproloculum of the first form is nearly
3.3 times and that of the second in nearly 1.3 times as large as that of the thirdform being 0.027 mm. in diameter. Thesemorphological differences seem to be due

to trimorphism (lloFKER. 1930). Concern·
ing trimorphism. CusmiAt\ t.l9-l8. p. 52~
stated as follows:
Form A 1 : ··With the largest megalo·~ pheric proloculum. the adultcharacters are taken on almost
at once."
Form A": .. With the smaller megalospheric proloculum. some ofthe early stages skipped in theproceeding are now present."
Form B: ·· With the microsphericproloculum, the greatest num·
her of early stages arc present."Thus it may be recognized that the firstform corresponds to Form A 1 • the second
to A, and the third to B. HoFKER (op.
cit .. p. 98) stated that the microspheric
form had more .. primitiYe .. characteris·tics than the megalospheric one. andthat A" was also more .. primitive .. thanA 1 . And the trochospiral coiling in theearly stages of the microspheric form of"Llnomalina" breggiensis will suggest aprimitive form from which the species
was derived. Accordingly this feature
seems to be essential for the characterof the species.
SIGAL Uoc. t:it.) described a " morphogenre.. Biticinella with :lnomalina
breggiensis as a type. I Ie stressed thatthe genus had accessory intraumbilicalapertures at the posterior border of thechambers. and one side was sometimes
irregularly developed so as to assume
an asymmetrical form. lie also dis·tinguished it from the carinate Planoma·
li11a. Tlwlmanninel!a and Rota!ipora, andfound a close relation to the trochospiral
Ticine/la. However. BoLLI, LOEBLICH and
TAPPA:\ (1957, p. 41) referred briefly to
Biticiuella as follows: .. If there are true
accessory apertures at the posterior border of the chambers and the test is
asymmetrically coiled as described it
would seem to be related to the Glo·

422.

Cretaceous Planktonic Foraminifera jrom the Aiidd/e Yezo Group 189

borotaliidae, although no other genus of
this family has accessory apertures onboth sides. If "apertures .. should prove
to be relict apertures instead. Hilirinella
would become a synonym of Plauoma·!ina." Later BANNER and BLOW i 1959)
included this genus into the synonymy
of G!obigerine/loidi'S CUSHlVIAN and TEN
DAJ\1. LOEBLICH and TAPPAN (1961) also
regarded Biticinella as a synonym of
G!obigerinelloides by restricting P!anuma·
tina to keeled forms. Referring to therelationship of Bilicinella breggiensis and"fluomalina" bcnlol/ensis i\'IOimow (=G!obigerinelloides bcntonensis of LOEBLICH
and TAPP.-\~). both SIGAL and LOEBLICH
and TAPPA:\ considered that they might
be synonymous. though no comparative
study was done. However as alreadymentioned. the trochospiral coi I i ng is
ascertained in the early stage of B.
bref!giensis. Therefore both species may
not be synonymous unless the early
trochospiral coiling stage is detected in
G. bentouensis. f'vloreover it should not
be adequate to include B. brl';.;giensis
under the genus (,'fobigerinelloides which
is defined as being planispiral through·out.
HOFKER (1960 assumed also Hilicinella hreggiensis as a Planomalina, though
he did not recognize Praeglobo/murana.
Pla11mnaliua and Higlubigerinella as tax·
onomically valid genera. He exemplified
that the three above-mentioned genera
appeared successively from the base to
the top of a sequence of the Albian clayof the Netherlands. HOFKEf(s conceptsof these genera are somewhat different
from those of LOEBLICH and TAPPA:\(1961). and his Praeg!obotrunrana is equal
to fledbe1ge/la of LoEBLICH and TAPPAN.
and P!anomalina is G/obigerillelloidc:;, re·spectively. In short. HoFKER found in
the Albian clay a successive occurrencesof Hedbergel/a. G/obigerinel!oides and Bi·~tlobigerinella.

Based upon this occur·
renee. he believed these three genera
were "artificial" and expressed different
developmental stages of a single biological unit (" Globigerina wseyi gens "J. His
concept in taxonomy is biologically basic(genetic). and he has assumed a critical
attitude in paleontologic (morphologic)
classification. For that reason he often
differs from other paleontologists inopinions on taxonomy. Leaving aside
this question. the fact that the primitive
form of this group shows lrochospiralcoiling and the planispiral form develops
in the next stage indicates a phylogenetic developmental trend of the group.
and this seems to correspond will withthe ontogenetic one deduced from trimor·
phism. Therefore this may be accepted
as an evolutional trend of the group.
From this point of view, "Anomalina"
beutrmensis must be a form more advanc·eel than B. breggiensis. if it is reallyplanispiral throughout (Globigerinelloides).
However. in the original description,~v!ORROW (193·1. p. 201) wrote that ....
"aperture peripheral. passing onto thedorsal side ...... and the test is "nearly
planispiral ". In the remarks on Globigerinelloides bentonensis. these expressions
were criticized by LOJmT.JCH and TAPPA;-.;(1961) as •· misleading", perhaps in themeaning of obscure definition of symmetricity or asymmctricity. But it also
rises doubt about the presence of trocho·
spiral coiling in the early stage of thisspecies. On this point further study ofverL ical sections will be necessary tosettle this problem. As mentioned above,it seems to be adequate to refer thisspecies to Biticinel!a rather than to
Globigerinelloides, though the aperturalcharacter of the former genus should be
reexamined.
The Jkushumbetsu specimens show
eight to nine chambers in the last whorl.

Yokichi T-lK.-l F.-liV.lGI and Ilisaiclzi IWAMOTO

l!lO

which is planispiral. They are biumbilicate, and nearly symmetrical in side
view, but both sides are not completely
symmetrical owing to the more or lesstrochospirally coiled early whorls. The
surface is generally smooth but roughly
finished in the early portion of the last\vhorl. The aperture is a broad, lowinteriomarginal. equatorial and bordered
above by a narrow lip. In some wellpreserved specimens, the lateral portionsof the previous apertures and lips remain uncovered by later chambers. as
mentioned by LOEBLICH and TAPPA'i intheir description of G!obigerinelloides
bentmu'11sis (1961. p. 267). But such accessory sutural apertures as figured by
SIGAL are not observed in the present
specimens in the same way as the one
figured by KI.AUS from Switzerland. Onthat account this species is herein tentatively referred to Biticinella ?
Occurrence :-Sporadically found in
the unit i\lc of the !\Iiddle Yezo group.

Family l~otaliporidae SIGAL. 1958
Subfamily lledbergellinae LoEBLICH
and TAPPA:-\, 1961
Genus I /ed/Jergella RRi)NNJ:\1 A'i'iand BROWiS, 1958

Hedberge/la delrioensis (CARSEY), 1926
Pl. 28, figures 10a-12c.

Globigerina crelt:cea o'0RBIG~Y var. delrioens!s
CARSEY. 1926. p. 43.
(Jlobigeriluz cretacea o'ORBIG:"Y. TAPPA:-1.
1940. p. 121. 122, pl. 19, figs. lla-c (notof o·OtHitGr"Y); T.-\PPA:-1, 19~3. p. 512, pl.
82. figs. 16a-17 (not of D'0RBIG"Y);CRESPI:"!, 1H33. p. 35. pl. 6. figs. 15a-c(not of D'01WIGNY); TAKAYA:"AGI. 1960.
p. 137. 138. pl. 10. tlgs. Sa-c (not of
D'0JWIGNY).

G!obigeriw1 ![(:utierensis BRi)NNIMAI':I':, 1952. p.
11-14. pl. 1, figs. 1-3. text·figs. 2a-m.
G/obigerin:z delrioensis CAR51cY. FIHZZELI.,
1H5·1. p. 127. pl. 20. figs. la·c.
Prueg/obotnmcuwt
gautierensis(BROKNI·~H:->:'>). BOLLI. 1959. p. :!65, 266. pl. 21.
figs. 3a-6: ]ONES. 1960. p. !02. pl. 15, figs.
1a-9c.
Praeg/obotnmr:un:t cf. ![aufierensi s ( BRb:-<N 1~IA:'>:--:). BOLLI, 1959. p. 26G. pl. :!1, figs.
7a-8.
Praeglobotrrmcana (Hedbcrgella) delrioensis(CARSEY). BANNER and BLOW. 1959, p. 8.
Globigerina cf. delrioensis CARSE\. TAK ... YA·'\AGI. 1960, p. 138. pJ. 10. fi)~S. 9a-C.
Hedbergel/a delrioensis (CARSE\'). LoEnl.lcH
and TAPPA:-1. 1961. p. 2/5. pl. 2. figs. 1la13c.

Hypotypes :-Figs. lOa-c. IGPS coli.
cat. no. 75139 from sample Im-12.!76;
figs. I la-c. IGPS coli. cat. no. 751·10 fromsample lm-12.103; figs. 12-ac. IGPS coli.
cat. no. 75141 from sample lm-12103.
Size ranges from 0.14 to 0.38 mm. in
maximum diameter.
Remarks:- There is a considerable
variation in size and shape among thepresent specimens referred to Lhis species.
In the former study (TAKA YA!'\AGI, 1960)
this species was distinguished from.. Globigerina cretacea.. in having muchinflated and globular chambers and distinctly protruded last chamber. Examining the specimens from the Ikushumbetsu area, however. such characters mentioned above are not so distinct
in juvenile specimens.
They show
usually about five subglobular chambersin the final whorl, and rather strongly
lobulated peripheral outline. In juvenile
specimens the proportion of thickness
to diameter of the test is smaller thanthat of the adult, and is rat her nearer
to that of Hedbergella amabitis LOEBLICII
and TAPPA.'i. But in comparing with
H. amabilis. this species is not so pro·minently lobulate in peripheral outline.

422.

Cretaceous Planktonic Foraminifera from the J.l1iddk Yezo Group HH

Although it should be said that suchforms assuming a juvenile stage aredominant in the present material. they
are all referred to H. delrioensis, becauseof the presence of all gradations between
those and the typical forms. Owing to
bad preservation, the fine surface ornamentation of the \Vall is not seen in thepresent specimens in the same way as
the other Hedbergella specimens.
Occurren,-e :-Not common. but foundin the units 1\Ia and Me of the Middle
Yezo group.

Hetfberge/la trocoidea (GA:>lDOLFI), 19-!2
Pl. 28. figures 3a-6c.
Auamalinu larm:iana(o'ORHIG:'\Y) var. trowidea
G.>.:-:DOLFI. 19-12. p. 98, 99. pl. 2, figs. la-c. pl. -1. figs. 2. 3. pl. 13, figs. 2a. b. 5a, b ;NoTH. 1951, p. 80. pl. ·1. figs. 27a-28b.
Ammwlitw !onzeia11a (o'ORBIG:->Y). GA:->DOLI'I,
19-12, p. 98. 99, pl. -1. figs. 1. 19, pl. 8, fig.
2. pl. 13. figs. la. b. 4a. b (not Rosa/ina
lomeiana o'OJWIG!'Y).
GlobiKerimr almadensis Ct:SH:I-1.>.:'\ and Tooo.
19·18. p. 95, pl. 16: figs. 18. 19.
Hetll•erge/la seminolensis (HARLT0:-.1). BRO:'\NI·
MA:->:-> and BROW:'-~, 1956, p. 529, p. 30, pl.
20. figs. -1-6.
Hedhergella trocoidea (GA:"DOLFI). BRo;-.:;-;,.
~IA:":-1 and BROW:-/, 1958, p. Hi, 17, text·
fig. 1 (a-c): KLAUS. 1960, p. 792. pl. 1,
figs. la-c: LoEnLJCll and T.\l'I'A:->, 1961.
J>. 277. 278, pl. 5. t1gs. la-2c.
Pracglobotruncmw(Hedhergella)trocoidea(GA:-;DOLFI). BA'>1->F.R and BLOW, 1959, p.
IS.

Hypotypes :-Figs. 3a-c, IGPS coli.
cat. no. 15135 from sample Im-12454;
figs ..ta-c, IGPS coli. cat. no. 75136 fromsample Im-J2.154: figs. 5a-c. IGPS coli.
no. 75137 from sample Im-12584: figs.
6a-c, IGPS coli. cat. no. 75138 fromsample Im-12·154.
Size ranges from 0.17 to 0.35mm. in

maximum diameter.
Remarks:- This species is characterized by the low trochospirally coiled
form with six to seven, most commonly
six and one-half chambers in the final
whorl; nearly fiat to slightly concave
spiral side and rather deep and narrowumbilicus on the opposite side: the last
one or two chambers are more inflatedon the umbilical side and show a ten·dency to extend towards the umbilicus;
and the aperture is interiomarginal, ex·traumbilical-umbilical in position andbordered above by a narrow lip.
The size range of the Ikushumbetsu
specimens is wider than that given by
LOEBLICH and TAPPAN (/oc. cit.), and thesmaller specimens are somewhat similar
to 1!. planispira iTAPPAN) in feature.
But in comparing with the latter species,
they show a thicker test with moreradially elongate chambers.
Occurrence :-Rather commonly foundin both the units Ma and 1\lc of the!\Iiddle Yezo group.

!Iedbergetla trocoidea (GANDOLFI)
yezoa11a TAKA Y ANAGl and
lw A:'vlOTO, n. subsp.
Pl. ~8. figures la-Ze.

Test medium in size. low trochospir·al. consisting of about two whorls, nearly flat to slightly concave on spiral side,broadly and rather deeply umbilicate on
opposite side, periphery broadly rounded,
peripheral outline distinctly lobulate:chambers inflated, subglobular to radially rather elongate, about seven to eightin final whorl, increasing gradually insize as added; sutures distinct. depressed, nearly radial on both sides; wallcalcareous, perforate, radial in structure,surface smooth; aperture a low interiomarginal, extraumbilical·umbilical arch

192

Yokichi T-lK.--lLlN.lGI and Hisaiclzi liFAJJOTo

bordered abo\'e with or without a slightlip.
l'vlaximum diameter of holotype , tigs.
2a-cl 0.38 mm .. maximum thickness 0.16
mm. !\laximum diameter of paratype(figs. la-c) 0.30 mm .. maximum thickness
0.15mm.
Types :-Holotype. IGPS coli. cat. no.
75l·U from sample lm-12632; paratype.
IGPS coli. cat. no. 751-13 from sample
Im-124S4.
Remarks :-The new subspecies isdistinguished from the typical one inhaving a comparatively larger test. morechambers in the final whorl, and a broad
umbilicus. The subspecific name is from
Yezo. an old name for I-Iokkaido.
Occurrence :-Rare but found in boththe units :'via and l\lc of the 1\•liddle
Yezo group.
Hedbe1gella washitensis (CARSEYI. 1926
Pl. 28, ligures 13a-14c.

(J!obigerina washitensis CARSI':Y, 1926. p ..u, pl.
7, fig. 1U, pl. 8, fig. 2; PLUM~IER. 1931, p.
193, 194, pl. 13, Jig. 12: T.\PPA:'\, 1940. p.
122. 123, pl. 19, figs. 13a-c; TAPP.'t.:\. 1943.
p. 513, pl. 83. figs. la-c: LoEnLICH and
TAPPA)<, 1949, p. 265, pl. 51, Jigs. 4a, b:
FRIZZELL, 1954. p. 12/, pl. 20.

figs. 9a-c:
1956. p. 293. 294. pl. 39. tigs. 2a-3c.
text·lig. 5 (lla, b): BoLLI, 1959. p. 2il,pl. 23. tigs. 6a-7b: T.-\KAYA:\.'t.GI, 1\JliO, p.
138, 139, pl. 10. figs. lOa-c.
Hedbergel!a washitensis (C.\RSEY). LOEBLICH
and TAPPA"i, 1961. p. 278. pl. 4, figs. 9BoLt:>;,11c.

Hypotypes :-Figs. 13a-c, IGPS coli.
cat. no. 75133: figs. Ha-c, IGPS coli. cat.
no. 75134. both from sample Im-12403.
Size ranges from 0.37 to 0.48 mm. in
maximum diameter.
Remarks :-Although this species isdistinct from any other species in having coarse reticulations on the surface.

the lkushumbetsu specimens are somewhat different from the typical one in
the feature of the last chamber. juvenile
specimens as shown in figs. 13a-c arequite similar to the previously described
ones. But the adult specimens, thoughoften crushed, show an abnormally re·duced final chamber with smooth surface(figs. Ua-c). The position of this chamber is rather constant, being locatednear a deep umbilicus on the umbilicalside. and protruding somewhat from thesurface of the previous chambers.
Similar features are often found in thebulla structure of the Tertiary andRecent globigerinids. However it isdifficult to assume this chamber as akind of bulla. because the chamber does
not cover the umbilicus. On the otherhand. the tendency of the final chamber
to become reduced seems to be not limit·
ed to the present specimens. but is also
seen in the fine illustrations by LOEHLICH
and TAl'l'Al:\ ( 1961. op. cit.). judging
from their illustrations. this tendency
appears in the adult form of the closely
related !-!. hiltermanni LOEHLICH and
TAPPA.': as well as H. washitensis. :1\lore·
over. in II. hi!tennann.i. the cancellatesurface ornamentation appears to be notso distinct on the final chamber as com·pared with those of the previous ones.
It is inferred from these phenomena thatsuch a tendency does not offer any
criteria for distinguishing the present
form the typical but may be an essenti·
al character to this species and its related forms.
This species has long been treatedas a G!obigerina. According to LOEBLICH
and TAPPAN (1961, op. cit.), the aperturalcharacter of this species is occasionallyalmost umbilical, but all gradations arefound to the characteristic umbilical·
extraumbilical aperture .. For that reason
they referred the species to IledbeJgel/a.

422.

Cretaceous Planktonic Foraminifera j1·om the Middle Yezo Group

So far as the lkushumbetsu materials
are concerned. their apertural positionis almost umbilical rather than umbilical-extraumbilical. In addition. most of
the illustrations previously so referredshow also umbilical apertures. So placing the presem species in the genus
HedbeJgella will leave some doubt.
Occurrence :-Not common. but foundin both the units ~via and l'vlc of the
JVlidclle Yezo group.
List of Localities of Samples
Im-12222 :-A cliff of a southern tributary of
the Ikushumbetsu River. about 2550 111.
S 40.5' E of the Ikushu111betsu Station.
and about 8250 111. N 87' E of the :viikasa
St:ltion of the Poronai Rai !way Line.
Mikasa-cho. Sorarhi·gun. Ishikari Province. (.tvlc).
Im-12252 :-A ciiff of a southern small tri·
butary of the Ikushumbetsu River. about
1625m. S 35o E of the Ikushumbetsu
Station. and about 7250 111. K 84" E ofthe .Mikasa Station of the Poronai Rail·way Line. l'viikasa-cho. Sorachi-gun. Ishikari Province. (l\la).
lm-12317 :-A cliff of a southern tributaryof the Ikushu111betsu River. about 3000111.
S 1' E of the lkushumbetsu Station. andabout 6tl25 m. S 82' E of the 11ikasa
Station of the Poronai Railway Line.
l\Hkasa-cho. Sorachi-gun. Ishikari ProYince. (Me).
Im-1232~ :-A cliff of a southern tributary of
the Ikushumbetsu RiYer, about 3200 m.
S 1.5' E of the Ikushumbetsu Station,
and aoout 6425 m. S 82' E of the 1\'likasa
Station of, the Poronai Railway Line.
Mikasa-cho. Sorachi-gun. Ishikari Province. (Me).
1111-12342 :-A cliff of a southern tributaryof the lkushu111bctsu River. about 2625
m. S 13" W of the Ikushumbctsu Station.
and about 5750 m. S 85" E of the !vlikasa
Station of the Poronai Railway Line.
Mikasa-cho. Sorachi-gun. lshikari Province. (Ma).

1!)3Im-12354 :-A cliff of a southern tributar~· ofthe lkushu111betsu River. about 4120 m. S
24.5" W of the Ikushumbetsu Station,
and about 4900 m. S 70' E of the :'viikasa
Station of the Poronai Railway Line,i\'likasa-cho. So rae hi -gun. Ishikari Province. (Ma).
Im-12355 :-A cliff of a southern tributaryof the lkushumbetsu River. about 4120
m. S 24" \V of the lkushumbetsu Station.
and about 4950 m. S 7' E of the l\likasa
Station of the Poronai Railway Line,l\likasa-cho. Sorachi-gun. Ishikari Pro...-incc. (Ma).
Im-12393 :-A cliff of a southern tributary of
the lkushu111betsu Ri\·er, about 4100 m. S
8.5° W of the Ikushumbe:su Station. andabout 6000 m. S 75' E of the Mikasa Station of the Poronai Railway Line, 1\likasacho. Sorachi-gun. Ishikari Province. (Me).
Im-12403 :-A cliff of a southern tributary of
the lkushumbetsu J{iver. about 3825m. S
HI' \V of the lkushumbctsu Station. andabout 5275 m. S 73.5' E of the Mikasa
Station of the Poronai Railway Line,
Mikasa-cho. Sorachi-gun. Ishikari Province. (.Mn).
Im-12406 :-A cliff of a southern tributary of
the lkushumbetsu Ri\·er. about 3700 m. S
22' W of the lkushumbetsu Station. andabout 5075 m. S 70.3" E of the Mikasa
Station of the Poronai Railway Line,l\likasa-cho, Sorachi-gun. Ishikari ProYince. (Ma).
Im-12453 :-A cliff of a southern tributary of
the Ikushumb;!t.su River. about 6150m. S
13.5' W of the lkushumb2tsu Station,<.nd about 6000 111. S 50.5' E of the Mikasa Station of the Poronai Railway
Line. Mikasa-cho. Sorachi-gun. Ishikari
Province. (Me).
Im-1245-l :-A cliff of a southern tributary of
the Ikushumbet::;u RiYer. about 6175m. S
15.5' W of th':! Ikushumbetsu Station,
and about 5075 m. S 70.5'' E of the Mikasa Station of the Poronai Railway Line,
Mikasa-cho. Sorachi-gun. Ishikari Provin·ce. (Me).
lm-l:H76 :-A cliff of the Shikoro-zawa. asouthern tributary of the Horomui River.

19-l

Yokichi T4K·ll"/LVAG/ and Hisaic/zi IWAMOTO

about 5420 m. S 40' W of the i\bnji Station, and about 6200 m. S 17.5' E of the
Miruto Station of the ~Ianji Railway
Line. Kurisawa-cho, Sorachi-gun, Ishikari Province. (:\lc).
Im-12478 :-A cliff of the Sikoro-zawa. asouthern tributary of the Horomui River,about 5-150 m. S 39" W of the i\lanji Station, and about 6450 m. S 18.5' E of the
JVJiruto Station of the .i\Ianji Rail\vay
Line, Kurisawa-cho, S~rachi-gun, Ishikari
Province. (Me).
Im-12546 :-A cliff of a north.:!rn tributary of
the Iloromui River. about 9650 m. S 13'
W of the lkushumbetsu Station, and about 8350 m. S 29.5' E of the Mikasa Station of the Poronai Railway Line, Iwamizawa City, Ishikari Province. (:vic).
Im-12584 :-A cliff of a northern tril)Lltary of
the lloromui River. about 8280 m. S 8.5'
E of the Ikushumbetsu Station. and about 7880 m. S 70' E of the .Mikasa Stationof the Poronai Railway Line. Jwamizawa
City. Ishikari Province. Cvlc).
Im-12585 :-A cliff of a northern tributary of
the Horomui River, about 8250 m. S 8.7'
E of the Ikushumbetsu Station, and about 7830 m. S 70' E of the lVIikasa Stationof the Poronai Railway Line. lwamizawa
City. Ishikari Province. (Me).
Im-12611 :-A cliff of an eastern branch of
the Sekiyu-zawa. a northern tributary of
the Horomui River. about 8050 m. S 20'
W of the Ikushumbetsu Station, and about 6470 m. S 33' E of the l\1ikasa Stationof the Poronai Railway Line, Jwamizawa
City, Ishikari Province. (Ma).
Im-1261-1 :-A cliff of an eastern branch of
the S::kiyu-zawa, a northern tributary of
the Horomui River, about 8000 m, S 19'
W of the Ikushumbetsu Station and about 6530m. S 34" E of the l\likasa Station of the Poronai Railway Line. Iwamizawa City, Ishikari Province. (.:'via).
lm-12632 :-A cliff of an eastern branch of
the Sekiyu-zawa, a northern tributary of
the lloromui River, about 7630 m. S 12.5'
W of the Ikushumbetsu Station. and about 7070 m. S 40• E of the Mikasa Stationof the Poronai Railway Line, Jwamizawa

City, Ishikari Province. (Me).
Im-1265-1 :-A cliff of an eastern branch of
the northern tributary of the Anoro
River. about 1200 m. S 74.5" E of Hatonosu-yama. and about 5530 m. N 39.5' Eof the Shinfutamata Station of the Yubari Railway Line. Hinode. Yubari. City,
Ishikari Province. (Ma).

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fera: Part 1 Cenomanian. klicropaleonl·
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MATSli~IOTO, T. [Editor] (195-1), The Cretace·ous System in the Japanese Islands. fap.
Soc. Promotio11 of Scieuce. Tokyo, 32-l pp.,36 pis .. 77 text-figs.
- - (1959). Zonation of the Cpper Cretaceous
in Japan. /(ms/m Fniz· .. Fac. Sci .. ser. D,
Geol.. rol. 9. no. 2. pp. 55-93, pis. 6-11.
.1\IoRRm\·, A. L. (1934). Foraminifera andOstracoda from the Upper Cretaceous of
Kansas. jour. Paleont., rot. 8. 1111. 2, pp.
186-205. pis. 29-31.
1\AGAO. T .. SAITo, l{. and l\L\TSUMOTO, T.

196

Yokic/zi T!li\AL4NAGI and llisaiclti lJVAMOTO(1937), Preliminarynote on the ~ucccssionof Cretaceous strata along the course of
the Ikushumbetsu. Hokkaido. Geol. Soc.
Japan. four., 110/. 45. 110. 533, pp. ~59-~63,
1 text·fig. (in Japanese).
NOTH. R. (1951). Foraminifern a us Unter- undOberkreide des (Jsterreichischen Anteils
an Flysch. Helvetikum und Vorlandvorkommen. Geol. Btmdesansl .. fb .. Sondb. 3.
pp. 1-91. pis. 1-9, tables 1-~.
PL'C\1:\IER. H.]. (1931). Some Cretaceous
Foraminifera in Texas. Texas. Unit!.,
Bull .. uo. 3101, pp. 109-203. pis. 8-Hi.
S1r;AL. ]. (1952). Apers:u stratigraphique sur
Ia micropaleontologie du Cretace. X I X
Congr. Gcol. Internat., lv!onogr. Region.
1 Ser .. Algerie, 110. 26. pp. 1-45, t~xt·figs.
1-.!6. l table.
- - (1956a). ~otcs micropaleont.ologiquesnord-africaines. 4. Biticinefla breggiensis(GANDOLFI). nouYeau morphogenre. Soc.
Geol. France, C. R. Somm., no. 3, pp. 3536. 1 text·lig.
- - (195tib), !\otes micropaleontologiquesmalgachcs. 2. Microfaunes albiennes etcenomanicnncs. Soc. Geol. Frcm.:e. C. R.
Somm .. 110. 12. pp. 210-214. text-figs. 1-3.
T.\KAYA:'\AGJ. Y. (1960), Cretaceous Foraminifera from Hokkaido, Japan. Tolwku UnitJ.,
Sci. Rep., 2nd ser. (Geo/.), z•o/. 32, no. 1,
pp. 1-164. pis. 1-11, text.figs. 1-22. tables
1-12.
TAPPA:'\, H. (1940). Foraminifera from theGrayson formation of northern Texas.
]our. Pa!eont., z:o/. 14. no. 2. pp. 93-126.
pis. 14-19.
- - (19<13). Foraminifera from the Duck Creek
formation of Oklahoma and Texas. four.
Pal .. l'ol. 17. no. 5. pp. 476-5lo. pis. 77-83.
Y.\BE.
H. (1909), Zur Stratigraphie undPaliiontologie der oberen Kreide vonJ-lokkaido und Sachalin. Deut. Geo!. Gese!.,Zeitschr., Ed. 61. !/eft -1. pp. 402-441, textfigs. 1-.J. tables 1-3.
- - (1926), Geological guide to the excursion
to the Ikushumbetsu coal·mining district,
Ishikari coal-field. Hokkaido. Pan-PacificSci. Congr., Guide·Book. Excursion A-2.
pp. 1-26, pl. 1. 7 text-figs.

Explanation of Plate 28(a.·spiral Yiew: b.-umbilical view; c.-side Yiew)Figs. 1a-2c. lledbe1·gel!a trocoidea (GA:-!OOLFI) yezoana T AKAYA:"AGI and I \\'AMOTO. n. subsp.
1. Paratype. IGPS coli. cat. no. 75143 from sample Im-12.!54 (1\lc). x97.
2. Holotype, lGPS coli. cat. no. 75142 from sample lm-12632 (Me). x85.
Figs. 3a-6c. J-fedberge!la trocoidea (GA:-~ooLFJ)
3. !GPS coli. cat. no. 75135 from sample Im-12454 (l\lc). x91.
4. IGPS coli. cat. no. 75136 from sample lm-12454 (Me). x89.
5. IGPS coli. cat. no. 75137 from sample lm-12584 (:'vic). x93.
6. IGPS coiL cat. no. 75138 from sample Im-12454 (Me). XlOO.
Figs. 7a-9c. Biticinel/a ? breggiensis (GA:"DOLFJ)
7. IGPS coli. cat. no. 75130 from sample Im-12584 (lV!c). x57.
8. IGPS coli. cat. no. 75131 from sample Im-1258,1 (!\!c). x61.
9. IGPS coli. cat. no. 75132 from sample Im-12453 (l\Ic). x85.
Figs. 10a-12c. Hedbergel/a de/rioeu.~is (CARSEY)
10. IGPS coli. cat. no. 75139 from sample Im-12476 (Me). xlOO.
11. IGPS coli. cat. no. 76140 from sample Im-12-103 (:\!a). xss.
12. IGPS coil. cat. no. 75141 from sample Im-12403 (!\!a). x94.
Figs. 13a-14c. Hedbergtd!a washilensis (CARSEY)
13. IGPS coiL cat. no. 75133 from sample Im-12·103 (l'vla). x63.
14. IGPS coli. cat. no. 75134 from sample Im-12403 (Ma). x60.

TAKAYANAG! and I WAMOTO:

Cretaceous Planktonic Foraminifera

Plate 28

Trans. Proc. Palacont. Soc. Japan, N. S., No. 45. pp. lYi-200. pl. 29, April 10. 1962

42:1.

DISCOVERY OF THE FOSSIL GIANT SALAMANDER(i\IEGALOBA.TRACliVS) IN JAPAK*TOKIO SH!KAl\lA andYOSHIKAZU HASEGAWA

Geological Institute, Yokohama 1\ational liniversity

Introduction

their cordial thanks to them.
Thejunior writer could observe some comparative specimens by the courtesy ofDrs. S. UENO. H. OZAKI and Y. lMAIZUMI.
He also could gain valuable advice
and help for his research from Drs. Y.
OKADA, K. KOBA, H. T AKASIIE\IA, JVI.
SHt!\IIZll. T. !>.IIYAO, Y. IKO:'IIA and I.
l'cHIOA. The writers also express theirhearty thanks to these gentlemen.
The fissure deposits at the quarryof Shikimizu. the Shikimizu bed of thewriters, are mainly composed of brown
brecciated clay of 1-! m thick, underlain
by layers of black sand, yellow clav andgravel. also overlain In· red cia~ andblack humus. From th~ bed are -found
the following species.
Cervus (Deperetia) jJraenipponicus SHIKAMA
Siuomegaceroides yabei (SHIKAl\IA)
Capricomis crispus (TEJ\1.)
Cer!'us (Sika) nippon Tnt.
Macaca /uscata (BLYTII)
Me/es leucurus lmzuiiensis SHIKAJ\IA
Ursus japonicus ScH.
Maries len SHII\A~viA
Mustela itatsi TDI.
Lepus brachyurus TEM. & ScH.
Sciurus sp.
C/etlirionomys sp.

In the spring of 1958, Prof. K. NAGAIof the Geological Institute of the University of Ehime sent the writers numerous
fossil bones and teeth collected at alimestone quarry of Shikimizu. Hijikawamura, Kita-gun. Ehime Prefecture (132'
43'E, 33'28'NJ. Among them thev founda dental bone of a giant sala~ander.
Further. in the summer of the same
year, in a field survey jointly held by
the Geological Institute of Yokohama
National University and the Geological
Institute of Ehime Cniversity. supportedby the Caving Club of Shikoku. Ehime
News Press Co .. the authorities of the
Hijikawa-mura. several specimens of thesimilar species were gained from thesame quarry. The writers could obtain
valuable help and assistance from Prof.
K. NAG.-'11 and the members of his Institute, Prof. K. Y.n·tAGUCHT and the othermembers of the Caving Club of Shikoku.
1-.lessrs. :VI. NoGUCHI, II. Ocw and theother gentlemen of Eh ime News Press
Co .. rvlr. ?vi. IKE!JA and the other gentlemenof Hijikawa-mura. and wish to extend* Received Oct. 6, 1961, re:td Jan. 15. 1961.
Hl'i

Tokio SHII\.-B1A. and Yoshilwzu llASEC:.\IFA

Ul8

Apudemus sp.
Sorex shinto THOi\IAS
Crucidum dsinezumi 1TE:\L & ScH.)t11o}{era sp.
Rlzi1zolop/ms sp.
Pipistrellus sp.

Phasianus sp.
Aves, gen. & sp. indet.
Ophidia. gen. & sp. indet.
Lacertilia, gen. & sp. indet.
Bufo sp.

Rana sp.
Pisces. gen. & sp. indet.
Beside vertebrates tolerable numbers ofDecapoda. \lyliapoda and I\lollusca were
found. The fauna above mentioned iscorrelated with that of the Upper Kuzuii
formation and regarded to Late Pleistocene in age. Hitherto no fossil giant
salamander were found in japan. so thediscovery of it from the Pleistocene
formation in Shikoku is very significant
from the palaeogeographical point ofview.

Description
Megalobatrac/ms japoniws (TDI~IINCK)
Plate :-!9. ligures 1-8

Specimens :-A right parietal. a rightparasphenoid. three right dentary andthree vertebrae, stored in the Geological
Institute. Yokohama National University.
Locality :-Shikimizu limestone quar·
ry. Karaiwadani. Hijikawa-mura, Kita·
gun, Ehime Prefecture.
Horizon :-Late Pleistocene; Shikimi·
zu bed composed of yellowish brown
brecciated clay (fissure deposits).
Description :-Right parietal (figs. la.
1b).

Bone rather complete in preservation
but marginal part a little broken. Joint·
ing borders with left parietal, rightfrontal and with right orbitosphenoid
have some simple parallel shallow
grooYes. Bone becomes thinner fromposteno-1nner to anterio-outer sides.
Length and \\·idth as presen·ed 28.5 and15.G mm respectively, thickness 4.7 mm.
Right parasphenoid (figs. 2a. 2b).
A fragmental bone of anterior partof parasphenoid thin, flat, smooth andbroken in marginal part. Ventral anddorsal surface of anterior part marked
with shallow grooves running in radial
direction. Maximum length. width andthickness are 27.8. 9.8 and 2.2 mm re·spective\y.
Right dentary no. 1 (figs. 3a-3d).
Bone good in preservation althoughtips of anterior· and posterior parts
slightly broken. Length as preserved+8.7 mm. height and length of dentalarch 54.5 and cl.7 mm; height and thick·ness at anterior end 9.4 and 5.6 mm respectively.
Fossa for angular large,
long and concave in buccal side. Pleuro·
dont teeth sit at ridge of bone: teeth
crown lost. Root undenloped, but tubes
of dental pulp of thirty three in numbers. developed at dental arch. A crosssection of tube o\·at shaped. 1.5 mm inlong diameter and 0.7-1.0 mm in short
diameter. Height of tube 7·1 mm inmedian part; interval between tubes 12 mm. The osseus tissue of tubes thesame as that of dentary. Attached areaof the tubes to the wall of dental archbecomes narrower upwardly.
Right dentary no. 2 1figs. 4a, 4b).
A fragment of posterior part pre·served. Bone as large as no. 1; height
and thickness at end of dental arch 14.3
and 5.1 mm respectively; length as preserved +50 mm and length of dentalarch +33.-1 mm. Dental pulp tubes all
lost; shallow fossae and low ridges run
in alternation on dentary.
Right dentary no. 3 lfigs. 5a, 5b).

/123.

Discovery of the Fossil Giant Salamander u1Iegalobatraclmsl

A small fragment of dcntary pre·,;erved at the area of maxillary foramen.
Bone considerably worn.
Three vertebrae preserved of presacral and post third vertebra.
Vertebra no. 1 (figs. 6a-6d).
Bone lustred, considerably large andthicker than the following two bones;
ossification developed: ventral
side
thicker than dorsal side. Centrum amphicoelous. longer than high and handdrum formed in general outline withmedian constriction. Centrum 18.8 mm
long along median ventral line; anterior
glenoid cavil y 11.5mm wide and 12.0mm
high, while posterior glenoid cavity 12.2mm wide and 11.2 mm high. Glenoid
cavity oval. deep, unpierced and withmedian foramen lying dorsally; ventral
surface of glenoid cavity larger thandorsal one; anterior median foramenalmost touches posterior one.
Some
nervous foramen opened on ventral
surface of mid centrum. Right pre·zygapophysis andrighttransverse
process broken off ; base of left transverse process preserved. Right half ofneural broken. Prezygapophysis stout
and large. Zygapophysial ridge welldeveloped. concave in dorsal view. particularly at its posterior part. Articulat·
ing surface of prezygapophysis elongate
oval in shape. longer than wide, ..,--7x6mm and directed anterio-lateralward.
Vertebra no. 2 (figs. 7a-7c).
Bone slightly smaller than no. 1 andossification insullicient. Distance fromtip of left prczygapophysis to tip of left
postzygapophysis 16 mm. Anterior glenoid cavity higher than wide, 6.7 mm
wide and 6.9 mm high; posterior glenoid
cavity wider than high, 7.4 mm wide
and 6.6 nun high. Centrum 12.2mm long.
neural canal 3.7 mm wide and 2.2 mm
high. Neural arch at the narro\Yestportion of zygapophysial ridges slightly

1 ~l9

wider than centrum. Antl'rior neural
canal crescent. convex upward. while
posterior canal more circular than anterior. Articulating surface of prezygapo·
physis elongate oval. much longer thanwide and relatively longer than that of
no. 1. Articulating surface of post·
zygapophysis ovate. Zygapophysial ridge
well developed and slightly concave in
dorsal vie\v. Right pre· and postzygapo·
physis broken off. Neural arch provid·
ed with an elevated ridge-like mediankeel : neural spine absent.
Vertebra no. 3 (figs. 8a-8e '·Bone like no. 2. Transverse process,right prezygapophysis. left postzygapo·
physis and upper part of posterior glen·
oid cavity broken off. Length of centrum
12.0 mm: distance between tip of left
prezygapophysis and tip of right post·
zygapophysis 18.8mm: width of posterior
glenoid cavity +7 mm. A foramen at
the posterior margin of neural arch
fairly deep and triangular with longest
ventral margin.
Remarks:- The individual numbersof the giant salamander in question seemto be four in total; at least one is smaller sized and at least three arc larger
sized. The specimen stored in the Ceno
National Science lVI useum is 1170 mm intotal length and that of Ueno's collection is 380 mm in ditto: assuming fromthese specimens. the smaller one seems
to be about 500 mm long and larger ones
about 900 mm long. This species has
relati\·ely longer \·ertebrac than the
recent species (figs. 9a-9d), and no otherclear distinction can be noticed between
the two species. Thus the writers put
this species to a recent one. As theexistence of fossil species is establishedin Shikoku, it may also be possible todiscover a recent species in Shikoku.
the writers think.

Distributionof,1/e~talobat radws :-200Tokio SHIKAM,l and Yos/zikazu

After I. SATO the recent species isknown from l\Iiddle Honsyu and North
Kyusyu; the Kirigamine. Suwa-gun.
Nagano Prefecture (northern limit of
distribution). the Nagara River and theUpper Hida River, Gihu Prcf .. the Nabari River. Mie- and Nara Pref.. theUpper Asahi- and the Takahashi Rivers,
Okayama Pref.. the Upper Yura River.
Kyoto Pref.. the Upper Ota River. Hiroshima PreL, the Toyooka River. llyogo
Pref.. the Tenjin- and Hino Riyers.
Tottori Pref.. the Eno River, Shimane
Prcf.. the Nishiki River. Yamaguchi
Pref. and the Yakukan River. Oita Pref.
etc. Some questionable samples. known
from the suburbs of Matsuyama cityand Kagawa Pref. (ISHIKAWA. 1935). may
be supported by the fossil species.
Cryptobranchidae is distributed in theworld as follows: recent species is in
Eastern Asia including Japan. Lower
Pliocene one in Nebraska. North America and Miocene-Upper Oligocene one inEurope. It may be said that Cryptobranchidae migrated in geological ages from
Europe to Eastern Asia.

H.rlSEG:HVfl

References
BLAIR.

w. F .. A. P. BLAH~. P. BRODKORB, F. R.

C.-\GLE. G. A. MooRE (1957). Vertebratesof the United States. pp. 218-219.
CPVJER. G. (1825). Recherches sur lcs essemens fos5iles. tom. 5, pt. 2. pp. 431-444.
pl. ~6.
DAHLI:>;CTO:>;. P. J. (1957). Zoogeography.
lSIIIKA\\'A, C. (1903), Natural History of
Giant Salamander. four. Zoot. japan. l'O{.
1.'>. /10. 17 2. pp. 59-62.
ISIIII\AWA. j. (1935), On the giant salamander captured in '1-.Iatsuyama City. Zoo/.
Mag. Japan. t•ol. 47. no. 564. p. 11-!.
KABL:RAKI. T. (1932). Habits of the giant
salamandet' (.1/egaloba/ radms japonicus).
Gifu Prcf. Rep. Nat. 11Iommz. Sun:., no.
2. pp. 108-111.
- - (1938). Habitats of the giant salamander(:1/egalobatradms japouicus). Rep. lli-af.
Uonum. Sun• .. 110. 3, pp. 98-103.
OKADA. Y. (19-!9). Illustrated Encyclopediaof the Fauna of Japan. rev. ed., p. 290.
SA-ro. I. (19-!3). Introduction of Japanese
Urodela.
StEBOLD. P. F. (1842-4'7). Fauna Japonica. no.
3. :llamnmfia et Reptilia, pp. 1~1 -135. pl.
6-8.

- - - - - - - - - - - - - - - - - - - - - - -------

Explanation of Plate 29,Hega/oba/raclms jajJrmicus (TE:-.t.)Fig. 1.
Fig. 2.
Fig. 3.

A part of right parietal. x 1. a, ventral side: b, dorsal side.
A part of right parasphenoid, X 1. a. ventral side: b. dorsal side.
Right dentary. a. buccal side, x 1: b . lingual side. x 1; c. upper side, xl. 95: d. lingualside. X 1. 95.
Fig. 4. A part of right dentary, x 1. a, buccal side: b, lingual side.
Fig. 5. A part of right dentary, X 1. a, buc.:al side: b. lingual side.
Fig. 6. Vertebra no. 1. x L 9. a, dorsal side: b, ventral side; c, left side d. posterior side.
Fig. 7. Vertebra no. 2. x2. a. dorsal side: b, ventral side: c. left side: d, right side; e. anterior side.
Fig. 8. Vertebra no. 3. x 2. a. dorsal side: b. ventral side: c. right side; d, anterior side; e.
posterior side.
Fig. 9. Twentieth vertebra of recent specimen (Ueno's coli.). xl. 7. a, dorsal side; b. ventral
side : c, anterior side; d, right side.

Smi.:AlviA and H ASEG;lWA:

T AKAG I a nd H A S EGAWA

photo.

Megalobatrachus

Plate 29

Tram;. Proc. Palacont. Soc. }:tpan. N. S., No. 45. pp. 201-20G. pl. 30, April 10. 1962-!2-l..

DASYBATUS FROl\f THE JAPANESE :\HOCENE*
KOTOHA HATAI and TAivliO KOTAKA
Institute of G.:ology and Paleontology. Faculty of Science.
Tohoku liniversity. S;ondai Japanr:f::rjrlli:N=wrflfi: il'/m ¥:-·f!J;:&o:mtt~77:.:. .t "'?-c. .:tJt .:c Jti"JI iJt!W:t-s .J: L"JlJP:l~.:::) }~.fi!. ~.hLiiil(l:fi~m'tflft'= lt~~I~U;J- L. !Jasybalus masudae t.c ~>v":.:. Dasybatus llippon·

ensis ctiJ;.t.L-c.W-i'ri"¢.

:1:10 Jl: 'l·~· ,J. il'li Li(*

with the Recent Dasybatus akajei OVIUL·LER and HENLE) from the shallow sea
off !\1liyagi Prefecture and found to be
yery similar in the preserved featuresof the shaft. The smaller one which
was collected by Dr. l\1,\SUDA was compared with both the Gifu specimen andRecent ones and found to be somewhat
different, thus its generic position is
doubtful. However. since this may be
the first record to fossil Dasybatus fromthe Cenozoic deposits of Japan. it isthought worthy to describe and illustrate
them.
Here the writers thank Dr. Koichiro
MASUDA and ~vir. Yoshiharu TA~IURA for
kindly offering the specimens to . thewriter's study. Particular thanks are
due to Professor Kei·ichi O:IJORI of theInstitute of Economic Geology. Petrology
and Mineralogy of the Tohoku University for kindly identifying the material
from which the shafts are made.

Introduction and Acknowledgements

Two small, gradually tapering shaftswith minute and curved denticle on bothlateral sides. and from different localities,
were offered to the writers for study.
One of the two specimens was obtainedby r..tr. Yoshiharu TAJ\IURA, a graduateof the Institute of Geology and Paleontology, Tohoku University. during his
field work in the classical area of Mizu·
nami in Gifu Prefecture. and the otherwhich is the smaller, by Dr. Koichiro~!ASUDA of the Department of Geology,
College of Education. Tohoku University
from the well known area of Ninohe in
Iwate Prefecture. The former was dug
out from a tuffaceous sandstone situatedat about seven to eight meters above
the base of the low·er part of the marine
Yamanouchi formation in the Karima·
bora valley at Togari in l\lizunami City.
Gifu Prefecture and the latter from themarine Shiratori member of the Kadono·sawa formation in the valley at Nisatai.
Fukuoka·machi. Ninohe·gun. Iwate Pre·
fecture.
The larger specimen was compared

Description of Dat'IJJbatus Specimens

Dasybatus nipponcnsis HATAI and[(OTAKA, n. sp.
Plate 30, Figures 5, 8. 10.

* Received on Sept. 29. 1961, read at 79th

Description :-Shaft slender, graduallytapering, measuring 92 mm in length

meeting of the Society at Kanazawa. Sept.
23, 1961.

201

202

Kotara HtTA! and Tamio KoTAK.4.

plus 14 111111 of impression. about 9 111111
at preserved broadest anterior part andabout 2 mm at preserved narrowest posterior part and about i> mm in thickness.
Shaft nearly straight. flattened anteriorly
and posteriorly, more or less by subsequent pressure. with deep and narrowgrooves and rounded narrow ridges longitudinally arranged on external surface.
the number decreasing posteriorly. Sidesof shaft with numerous anteriorly directed denticles numbering about five per fivemillimeters distance. Each denticle conical. polished, well rounded. sharply pointed at apex. broadening basally. broader
than their interspaces. all directed anteriorly. Extending outwards from basal
part almost perpendiculary althoughsomewhat obtusely, then becoming moreor less parallel with the lateral sides ofshaft. All denticles pointed apically. theirrespecti\·e interspaces and thickness mayvary somewhat and some appear to beequal to their interspaces in breadth although of the same shape. Dorsal andventral sides of shaft apparently withsharply clc\'ated central ridge developed
posteriorly but not anteriorly where it
grades into more or less uniformly rounded shaft but a little flattened so far aspreserved parts show.
Locality :-from a tuffaceous sandstone
situated at about seven to eight metersfrom base of lower part of Yamanouchi
formation in the Karimabora valley at
Togari ..\lizunami City. Gifu Prefecture.
Early \·liocene.
Remarks :-Compared with the shaftof the Recent Dasybatus akajei (!\!tiLLER
and HE:-\I.E). (figs. 3. 4. 6. 7, 9) a living
species of Japan. the fossil form is almost
indistinguishable except for the morerobust shaft, apparently stronger ridges
on its anterior dorsal portion. sharper angl·
ed dorsal and yentral ridges at the posterior pan. more number of denticles perten millimeters distance. there being only
about eight to nine in the li\·ing species
at the posterior part and about 12 near
the middle part. which is more than in
the fossil specimen measured at the near·ly same positions. However. both aresimilar to one another in the generalshape, possession of grooves and ridges
on the dorsal surface at the anterior
half of the shaft. sharply pointed conical clenticles all directed anteriorly andin their being closely arranged. The
denlicles of both fossil and living specimens are similar in extending outwards.
first rather perpendicularly then abruptly
or gradually becoming nearly parallelwith the contour of the s)wft itself.
Because of the differences above statedof the fossil specimen and the Recent
one. the former is considered to represent a new species, for which the nameof nippom:nsis is here proposed.
Shafts are developed in My/iobalus tobijei BI.EI~KER. Pterop!atea japrmica TEi\1·:\lJNCK and ScHLEGEL, Dusybatus Zugei(1\lLiLI.ER and HENLE). Uro!oplius fuscus
GARliiAt-.:, besides Dasybatus a/wjei (i\IUL·LER and 1-lE:--:LE), among which only thelast mentioned is in the present collection. The shafts of the other mentioned
species were examined from illustrations.
All of the mentioned species are known
from the seas of the japanese Islands
being more common in the southern partbut individually abundant in northern
Japan (!Jasybatus a/wjei). Raja Eenojei\IULI.ER and Saske japonica lTE:\1:\11:'\CK
and SCHLEGEL) belong to the same group.
but are not known to have double-sawteeth-like shafts.
It is very difficult to obtain Recent
specimens particulary because the tails
arc nearly always removed immediately
after their capature by chopping or cutting since they may cause seyere injury.
For this reason it is thought worth while424.

Dasybatus jJom the Japanese Miocene

to describe the Recent specimens at handand also because very lillie is known of
the characteristic feature. The descrip·
tions will be !{iven of the tails of Dasy·
batus alwjei (i\ILILLER and IIE:'\LEI whichwere collected from the shallow sea off:tvliyagi Prefecture and submitted to thewriter for study by Dr. Senji TANITAof the Tohoku Regional Fisheries Re·
search Laboratory at Shiogama. ~liyagi
Prefecture. to whom the writer's deep
appreciation is due.
The shafts. •Figs. 3. 4. 7. 9; appear tobe outgrowths from the cartilage tailand thus only the shafts would be preserved as fossil. whereas the cartilage
skeleton and tail would decompose. These
shafts are situated generally on the dorsal central surface ,Figs. 7. 9) of the tailoccupying only the anterior half. The
posteriormost shaft is the largest andbest developed whereas those situatedmore anteriorly are smaller. taper more
rapidly, thilllwr. with only weak develop·
ment of grooves and ridges at their ba·
sal parts. usually extending outwards at
a higher angle. and have along theirlateral sides small denticles. L nderneaththe shafts are found conical swellings(Figs. 6. 'i, 9.' apparenlly in contact withthe shafts. and these apparently disap·
pear with the growth of the shafts. The
largest shaft has no such swelling below
it whereas the smaller the shaft themore developed is the swelling. Thissuggests that the shaft-bone de\·etopes
by excretion of apatite from the men·tioned conical swelling referred to above.
The process in excretion of the apatite
crystalized from collophane of a cartilage
tail and thl' true nature of the mentioned
swellings underneath the shafts andin contact with them is unknown towriters.
A Dasyhalus alwjci tail measuring about
51 em in length has one very large andthree small shafts, t \\'O pre· mature ones
between the first and second. and one
minute one anterior to the first small
shaft. The distance from the tip of thefirst small shaft l o that of the second
is about -!0 mm. from the second to third
about 35 mm. and from the tip of thethird to the tip of the largest and fourthabout 125mm. The largest shaft measur·ing 102 mm in length from base to tip
attains about nine mm in its broadest partwhich is near the basal part. The apicalpart is smooth for about seven mm where·
as anteriorly or basally the denticles grad·ually become well developed but are notdeveloped at the 32 mm distance frombase,apically. Grooves and ridges extend
apically for only about iO mm lengthfrom basal part apically, thereon apicallythe shaft is smooth. The denlicles areclosely spaced, all directed anteriorly andshow very slight variation in their spac·
ing. strength and developmenl.
Thethree smaller shafts show similar fea·tures as the largest one, but I he develop·
ment~of the denticles is premature. The
largest shaft is flatly rounded transver·
sally oval in its anterior part (which isalso basal) but apically the shaft develops
sharply elevated mesial portion both dor·sally and ventrally. Although the basal
part of the largest shaft narrows. thoseof the smaller three broaden and under
the obliquely projecting shafts are foundthe conical extensions of the tail-skin.
Another tail of the same species (liv·ing' of about similar length has four
small shafts and one large one. all ofwhich are smaller than those described.
All other features are the same as de·scribed above.
This may show that the lengths ofthe shafts and number of secondary
shafts are not related with the lengthof the tail, although the actual size ofthe ray-body may have some relationship204

Kotara H4.TA1 a11d Tamio KOTAKA

therewith, but this could not be determined.
The shafts, both large and small, area means for injuring the enemy by injecting them into the body. Since the tailis very flexible and easily moved in any
direction, they are always removed immediately after catching.
A shaft called T1ygon or Myliobatis wasreported by LADD (1934, p. 244, pl. 42.
fig. 9, pl. 43. fig. 5) from the Suva formation at an abandoned quarry on thesouth side of vValu !3ay. near the entrance. a few feet above sea-level. This
unnamed species resembles Dasybatus
nipponensis HAT AI and KoTAKA, n. sp. ingeneral features, but is distinguishable
by the number of denticles per one centimeter distance, shape of them and in
the surface sculpture and dorso-ventral
ridges.
Dasybatus (?) masudae 1-lATAI and
KOTAKA, n. sp.

Plate 30. Figures 1. 2.

Description :-Shaft short,measuringnearly 30 mm in preserved length, 4.5 mm
in breadth anteriorly and 3.5 mm inbreadth posteriorly and about 1 mm inthickness. Sides gradually tapering posteriorly. flatly oval in sectionan teriorly,
more rounded posteriorly. Posteriorly
shaft with sharply elevated central longitudinal ridge which dies out anteriorly.
Anterior part of dorsal surface with threerough ridges and grooves. ventral surface
concave, mesial grooves developed probably due to compression. posterior ventral
surface with several rough grooves andridges anteriorly merging into concave
mesial groove. Posterior half of shaft
with small denticles on lateral sides, alldirected anteriorly.
Denticles small,short, about 12 within a distance of lO
mm. low. rather widely spaced (from tip
to tip), their basal parts very broad, thewhole a low broad triangle inclined anteriorly. Denticles stronger posteriorly
than anteriorly where they gradually
decrease in size to nearly vanish near
middle of preseved length of shaft.
Locality :-From the Shiratori memberof the Kadonosawa formation in the val-

Explanation of Plate 30
Figs. 1. 2. Dasybatus (?) m:tsudae liAT.-\1 and KOTAK,\, n. sp.
Fig. 1--ventral surface showing median ridge, surface onnmentation and denticles. Fig.
2-dorsal surface of same specimen showing longitudinal ridges and grooYes and thedenticles. X 5. Locality-Nisatai, Fukuoka-machi. Ninoh::·gun, I wate Prefecture.
Figs. 3, .1, 6. 7, 9. Dasybatus allajei (MilLLER and HE:--JLE).
Figs. 3. 4-ventral and dorsal surfaces of shaft showing median ridge. surface ornamentation and development of denticles. Fig. 6-cross·section of tubercle developed on back(nat. size). Figs. 7, 9. Showing positions of shaft on me:lian portion of tail, the sculptureand denticles. Figs. 3, 4-x4. Fig. 6-nat. size. Figs. 7, 9-slightly less than nat. size.
Recent. Locality-off l'vliyagi Prefecture in shallow water.
Figs. 5. 8. 10. !Jasybatus .nippommsis HATAI and KOTAIC\, n. sp.
Fig. 5-enlarged view ( x 2) showing the development of denticles, rounded dorsal surface
and longitudinal sculpture. Fig. 8-same specimen in natural size. Fig. 10-enlarged portion showing development of denticles and their detail shapes and spacing. (x2). Locality-Karimabora valley, Togari Mizunami City, Gifu Prefecture.

H A TAI and KOTAKA:

Dasybatus from the Japanese Miocene

Plate 30

424.

Dasybatus from the Japanese Jv!iocene

ley at Nisatai. Fukuoka-machi, Ninohegun. lwate Prefecture. Early r-.liocene.
Remarks :-This species is easily distinguishable from Dasybatus nipponeusisby the narrower shaft. smaller denticles
of different shape, and in the shaft having a concave mesial groove anteriorly
on the ventral surface and by the sharply
elevated portion at the posterior partbeing developed better on the dorsal surface. The specific name is named after
the collector. Dr. Koichiro l\IASUDA inrecognition of his works on the paleontology of the Tertiary Pectinidae.

205

References
LAnD. H. S., (1934). Geology of Vitilevu, Fiji.
Bernice P. Bishop Mus .. Bull. 119. p. 3263, pis. 1-44, text-figs. 1-10, tables 1-7(refer to p. ~4-1. pl. .!2. fig. 9, pl. 43. fig.
5).
DAYID. L. R.. (1943).
Miocene Fishes ofSouthern California
Geol. Soc. .-!mer..
Spec. Papers. ~vo. 43. p. v-xiii+1-193. 39
text-figs., 16 pls.
TA);AKA, S., and ABE. M .. (1955), One thousand useful fish species (illustrated).
J/oriltoku Pub/. Co .. Tokyo, p. 1-294+1-12,1000 text-figs (in Japanese).

Trans. Proc. Palaeont. Soc. Japan, K. S .. No. 45. pp. 206-208, pl. 31. April 10, 1962

425.

OI\ THE EOCENE PLA~TS FROM THE \VOODWARDIAFORNI A TION OF THE ISHIKARI GROUP*SEJDO ENDO

:OHJi?if.F r •7 :· i· '7 l ~ ,. J IMi!HrH'lillf:fl:lillf.ifiJ, ~l:ifthgjAiHJ\¥/llf{i.lfJtl;(:~::. J: '? -ci*Ff)t;c~ld) r 'l 'Y ~ '71H:T J C='FI,ffi.') mi:t:.~t/:O){I::rilii'i!Jo/.iil:I±J.o<V-c:O~~!F<V~Jf'i' L. i?""'o <V:::.iJi.:~td~ifi.!:: t.1:-? -c!i5'6, ;P;fUiiiT!fu'i' L. G~t..:.n:m~t.di::O r '7':1 r '7 11.-~7 J ~:::.-::>l · -c <V""'o o :I!Hl~JG:tE:h.:I+IH-ti'ii:.~~ L -cr.s.o r :;t""' :t1 Y""" J t::. J: <fb!
f'i)..;f*it:lr~;h.t.:fl:,-cm.o.mLr*""'~Y~j!t1*U~~~~6*~~'0)-c~.o~. ~tO)#M~•~••{t;& <V#fll'i;l...tJ:.:t:h .:: IJ :1 .Oi.l·i::.'} ~"'?J'tff£.~ Jmlli~il;bil· '? t..:.<V"'CJlt{t:fi'i'Jt.~:flli.

<.fl.

~L.-c$~L.~.~~r~-y~?A~7J~<V~~ft~~~~~~O)-c~.o.

jijjiillf<Ja:fossil plants are now investigating by
the \\Titer, ~nd the genus Woodwardia
is one of the most important and characteristic plants at the fields. Therefore.
it will be the first, carried on the genus
lVoodtrardia.
The writer wishes to acknowledge hisgreat indebtedness to Prof. R. W. CHA:\EY
for kindly offering funds for the present
work.

Introduction

Many years ago. Dr. H. ll\IAI undertook a detailed stratigraphical study of
the Paleogene coal bearing group of thelshikari coal fields and finally establishedthe following subdivisions in Yubari district: (ascending order;
1. The Hakobuchi formation-unconformity2. The Noborikawa coal bearing
formation
3. The Horokabcts formation
4. The Yubari coal bearing formation
5. The Wakkanappe formation
6. The Woodwardia formation-unconformity7. The Poronai formation
Afterwards, it was restudied by thewriter and many other geologists, andthe subdivisions \Verc, on the whole, recognized by the many geologists.
Among above formations of the Ishikari group, the Woodwardia formation
contains abundant fossil plants. The

Description

Woodtmrdia japonica Sw. var. eoceuica
E'\DO(var. nov)

Pl. 31. fig5. 1-3, 5.

lVoodtcardia Endoana 0JSII1 et HuzJOKA:(Studies on the Cenozoic Plants of Hokkaido and Karafuto, I. Ferns from the
Woodwardia Sandstone of Hokkaido by
Saburo OISIII and Kazuo HuziOKA) jour.
Fac. Sci .. IIokkaido Imp. Univ., Ser. IV, Vol.
VI. So. 2, p. 187, pl. XLI (III) figs. 5.
6: pl. XLII (IV) figs. 1. 2, 2a, 3, 3a, 5. 6:
19.Jl.
Woodtmrdia decurrens OISHI et HuziOKA, Op.
cit .. p. 189, pl. XLII (IV) figs. 4, 4a: pl.
XLIII (V). figs. 1-3, 3a, 4, 5; 1941.

* Received Sept. 5. 1961 : read Sept. 23.
1961.

206

425. On the Eocene Plants from the lVoodzmrdia Formation
Description :-Frond bipinnate, morethan 30 em. long: rachis :> mm-L acrossmeasured on the compressed surface inthe material : pinnae alternate. linear.
long and narrowing gradually towards
the apex and attached to the rachis at
an angle of about -10± degrees: pinna
axis bears a single series of long andlow areoles on each side; pinnules trian·
gular in shape with acuminate apex,
slightly falcate; midnerYe distinct, witha series of low areoles generally 6-7 in
number or less on each side: secondary
nerves which arc given off from thearcoles. thin and generally indistinct.
simple or once forking : margin finely
serrate-toothed or almost entire: sori 57 in number on each side of the mid·
nerYc. as in the existing species. linear
and oblong. one to each areole: indusium
attached by its outer margin to thesorus·bearing areolc; sporangia are quite
similar to the existing species.
Nemarks :-The present material isquite identical with the existing lVood·
1mrdia japonica Sw .. which is now grow·ing in the Islands of Kyushu etc., South·ern japan. In the present material. thesecondary nen·es of the pinnule are sim·
pic or once forking, but in the existing
species. it occurs, rarely. areoles, except
simple or once forking secondary nerves.
In the nervations of the seedling of Wood·zmrdia orienta/is are. always. simple oronce forking, except a series of sori pro·duCing areoles on each side of the midnerve, while in the adult ones. there arealways, network nervation.
The nervation of the seedling of Woodzmrdia orienta/is 'Pl. 31, fig. 4) is quite
similar to the nervation of Jroolllmrdia
jaj)()Jiica. The nervation of IVootfmtrdia
japonica is a primitive type than the
nen·ation of Woodtcardia orienta/is. The
geological occurrences of ll"oOlbmrdia cfr.
orienta/is type are from the younger

20i

Shirakawa formation near Kobe (SIIIKA·
r.tA) probably the l\liocene in age, thanthe H'oodt11ardia japonica type. that occurs
from the Eocene Woodwardia formationin Hokkaido.
The genus Hroolllmrdia was classified
in three types. by H. CHRIST; namely,
lVoodwardia vi1ginica type (I) Pl. 31, fig.
6, Woodwardia radicans type (II) 1'1. 31.
fig. 2. and IVoodtcardia areola/a type OIII
Pl. 31. fig. 7; and the present material
and IVoodn·ardia japonica belong to thelVoodwardia virgiuica type (1). and H'ood·u:ardia orienta/is belongs to the IYoorllrar·
dia radicans type (I I).
1'\ext. the distinctiYe characters ofIVoodtcardia endoana and Tl'ood1cardia
dcmrrcns were precisely detected by thewriter, the former two species belong toTV. oirginica type (see op. cit., p. 189, Pl.
V, fig. 5) and unlike to IV. orienta/is \IV.
radimns type1.
It seems to the writer that these aresame species with present species.
A not her allied one is IVoolilmrdia JHaxoni. which was described by F.l-1. 1\.J\O\\'L·
TO:\ from the Paleocene formation of
Wyoming. but it is incomplete material
for identify to our present material.
It is. however, Woodwardia virginica
type and the most allied one to thepresent material.
Another allied species. Woodl('ardia/atiloba sen·ata K:sowL TO:'\, was describedfrom the Paleocene of the Middle Park,
Colorado. This is probably the oldest
known species of the genus Wood1mrdia
in the geological age. The material is.
however. too incomplete to the identifi·
cation. but it is also Wood~eardia z·irgi11ica
type of CHRIST. The generic term ll'oodzmrdites, which suggests affinity withthe recent genus IVondtmrdia. has beenused for Rhaetic plants bclong'ing to theDipteridinae (?). On this fern, HARRIS
says, " There are profound differences

Seido ENDO

208

between the present fern and TYoodiNirdia both in venation and sorus and it
was only mistakenly regarded as the oldest member of the polypodiaceae."
Literatures cited
CHRIST, H. (1897): Die Farnkrauter der Erde.
- - (1910) : Die Geographic der Farne.
DoRF, E. (1933): Pliocene Floras of California.
Camegie l11st. IFash. Pub/. No. 412. 1933.
E;-.;GJ.ER's (1954) : Syllabus der Pflanzen
familien xii Auflagc.
ETTI!\iGSHAU:;E:-.;, C. VoN. (1865) : Farnkriiuter der Jetztwelt.
h·IAI. H. (1924): Studies of stratigraphicalgeology in the coal bearing Tertiary of
the Ishikari Coal field, Hokkaido. four.
Geogr. (Tokyo Geo~tr. Soc.). Vol. 37.
HARRIS, T. M. (1946) : Liassic and Rhactic
plants collected in 1936-38 from East
Greenland. ·• llleddelelser om Griinltmd,"
Bd. 114. Nr. 9.
HEER, 0. (1855) : Flora Tertiaria Ilelvatiae,
Bd. I.
JIJR:-.JER, M. (1927) : llandbuch dcr l'alaobotanik.
KR.:\usEL, R.: Nachtriige zur Tertiar Flora
Schlesiens. I, 1920, III. 1921. ]ahrb. Preus-

sisclren Geol. Vmdcsanst; Vol. XXXIX.
Teil. I. 1918 (1920). Vol. XL. Teil. I. 1919
(1921).
KNOII'LTO:>:, F. H. (1910) : Descriptions offossil plants from the :\lesozoic and Cenozoic of North America, L Smithonian;l/iscel. Col/., Vol. 52, Pt. 4.
- - (1930): The Flora of the Denver andassociated formation of Colorado. U.S.
Geol. Surv. Prof, Pap., Vol. 155.
- - (1900): Flora of the Montana formation.
Bull. U.S. Geol. Surr .. No. 163.
LA:-IOTTE, R. S. (1952) : Catalogue of the
Cenozoic plants of North America through1950, (;cot. Soc. llmer., cUem. 51.
LESQUEI~Et:x, L. (1878): Tertiary flora. Rept.
U. S. Geol. Sttrt•. Terr .. Vol. 7.
OGATA. M. (1935): leones Filicum japoniae,Vol. VI.
OiSHI, S. and Ht.:ZJOKA, K. (1941): Studies
on the Cenozoic plants of Ilokkaido andKarafto. L Ferns from the Woodwarclia
sandstone of Hokkaido. ]our. Fac. Sci.,
Hokkaido Imp. U11i''· Ser. IV. Vol. 4. No. 2.
SHIKA~IA. T. (1938): On the Kobe group andits flora. jour. Geol. Soc. ]apau. Vol . .J5,
p. 628.
U:--:GER. F. (19-.17) : Beitrage zur Flora dcr
Vol welt.

Explanation of Plate 31
JVooduwrdia japonica var. eoccnica Er-:no, x2. Loc. Shimizusawa, Yubari City. Hokkaido.
lVoodwardia radicans Si\r. CHRIST, H. Die Farnkriiuter der Erde. p. 186. fig. 570, 1895.
IVoodwardia japonica var. eocet1ica E:-:oo, x5. Loc. Shimizusawa, Yubari City, Hokkaido.
TVoodwanlia orie11talis S:-.r. x3. Seedling, (Kumamoto)lVoodwarqia japonica var. eoccnica E:-:oo, x2. Loc. The river bank of the river Yubari,
Shimizugawa, Yubari City; Hokkaido.
Fig. 6. IVoodwardia t•irginica S:--.1. CHRIST, H. op. cit .. p. 186, lig. 569, 1898.
Fig. 7. Woodwardia areola/a MooRE. CHRIST, H. op. cit., p. 187. fig. 5il. 1898.
Fig. 8. TVoodwardia japonica Sw. The existing material. for comparison. Loc. Kumamoto.
Fig. 9. Woodrcardia orienta/is S:--.1. The existing material. for comparison.

Fig. I.
Fig. 2.
Fig. 3.
Fig. 4.
Fig. 5.

ENDO : Eocene plants jrom the Woodwaldia formation

2

3

4

5

6

7

9

8

Plate 31

Trans. Pro~.:. Palaeont. Soc. japan, I\. S .. :\o. -15. pp. 209-225, pis. 32-34. April 10. l!l62

42!i.

EOCENE PLANKTO:\IC FORA::\IINIFERA FROl\I HAHAJil\fA(HILLSBOROUGH ISLAND)*TSUNEMASA SAITO
Institute of Geology and Paleontology. Tohoku Uni\'ersitym~·:,,!f.:lli;:fJiW:i1irtt't ff:tLW.:'J-~IllUif~£H1r•.:7.t1fi-t ~t1Mfr*'t!t. *IrJ.rD fi ".1.. 71 t·(.Vwnmulites bonincnsis liA:"Z.\ w ,,) . :}.; J: t,-:..t;-rDfti!.rD~~l.:*~:fifL£l!.(t:.fi{c~-t ~ :. ,!: ·cl!i <t.d:>~ <<Didf'JEin.: ~ .h.--c ~, ~ t./·. .:: i?rDRillf!Mfi ~ t..:. f.Mf<D J: ~ ·~1-~fiii .fl!R.It:O{c~/v"C'l·.;;,, £3:~JrDi'J!ml~HHL!aft:riffil·l? lia11tkenina dumb/ei ~<D 18 fll\il:~5}1]~~~;h. -fll:rD~ · :fll!rD~!Mil:rrt.:h;h"C~ ·~o .::;ht?rDitT:illrLt. Trinidad rD Navet W)~n·t?¥1H:\i~;ht.: fauna F.:.j'i:'ill1L<riltllil.lrri!t (Lutctian) {cf~.ki"~, ::.rDmtK~it7~~~:fl$.

n* iii m· IE

l:..t'Jift:?;h.U~i-l!U:~<-f!c-t~.

The Tertiary deposits of Haha·jima(llillsborough bland.1 are well known for
their yield of large Nummulites and otherForaminifera since the early part of thiscentury. Allhough lhe stratigraphy ofthis island is not yet established, there
are many paleontological contributions
by various \\·orkers. especially of thelarger Foraminifera.
Among them. H,\:\ZAWA made a gco·
logical sun·ey of Haha-jima in 1925 andcollected numerous foraminferous rocks.
The results of his stratigraphical andsubsequent paleontological studies were
published in 19-17 and 1950. when he de·scribed the large Nummulites as .Vummuliles boninensis and several others besides
the stratigraphic succession of the Eo·cene rocks in the island. He concluded
that llaha·jima was formed of Eocene
rocks and that the foraminiferal fauna
were largely of Lutetian in age.
Recent progress in the study of plank·
tonic Foraminifera now enables extensive
zonal correlation of the Eocene rocks. In

this concern. Dr. IIA:-iZ:\\\'A suggested thestudy of smaller Foraminifera which areassociated with the Eocene larger Fo·
raminifera and the foraminiferous rocks
collected by him were forwarded to thewriter for examination. This paper isdevoted to the description of the plank·
tonic Foraminifera. a discussion on theirgeological age and correlation of the Eocene rocks in Haha·jima ,,·ith other areas.
The writer thanks Dr. Shoshiro HAC\·ZAWA. Professor emeritus of the Tohoku
Cniversity, for suggesting this study andfor his advices on the stratigraphy andpaleontology of Haha-jima. Thanks arealso due to Professors Kiyoshi ASA:\0.
Kotora HATAI and Dr. Yokichi TAKAYA:\AGI of the Institute of Geology andPaleontology. Tohoku Uni,·ersity for
their valuable suggestions and encouragements.
(;cologie Setting
Ilaha-jima is a small, long and narrowisland in the Ogasawara (Bonin) group.
located approximately at latitude 26' -10'
N., longitude 138'JO'E. l\o geologic mapof this island has been published. Ac·* Received on O~.:t. ~. 1961: read at 79th
meeting oi the socit:ty at Kanazawa. September 23. 1961.
20!1

210

Tsunemasa SAITO

cording to (HANZAWA 1947), however, thestratigraphic section of the about 200
meters thick Eocene beds in Baha-jima is
as follows in descending order (quoted) :Meters''11 Bip/anispira limestone:

white, compact and cavernous, containing BiPla•tispira absurda (U:-.IBGRO\'E), Pellatispira sp., :lcervulina n. sp. Sekimon-yama and Onion Beach ........ 100
10 Discocyclina limestone: pink or white,indurated, with abundant Discocyclina(s. 1.) and pelagic and benthonic Fora·
minifera. The top of Akaiwa, ~ishiura .................................. 10
9 G!obigerina tuff: reddish-brown andgreenish-gray, abundant pelagic andbenthonic Foraminifera, and Discocyclina (s. 1.). Onion Beach, Oki-mura. . . . . . . . . . . . . . .................... 3-5
8 Discocyc/ina-Alt•eolina tuff: buff-colored, with abundant Discocyclina (Aktinocyclina) colamapi and All•eolina ja!'anus var. Nishi-ura . . . . . . . . . . . . . . . . . . 25
7 Eorupertia-.-1/veo/iua tuff: buff-colored,with abundant Eompertia bonineusis,.-!keo/i na jat.'mllls var., Lit/zotlumwium,
corals, echinoids and mollusks . .Kishiura and 100 meters north of Xishiura-bashi. . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
6 Tuff: dark green, Shizukazawa ....
several meters ..................... .
?
5 Nummulites-Discocyr:lina tuff and agglomerate: buff-colored, with Nummulites boninensis and Discocyclin[J (.tlktinocyclina) colcanapi. Cocoanut Beach,
Nanking Bea:h...................... :w
4 Tuff: white... . . . . . . . . . . . . . . . . . . . . .
7
3 Nummulites tuff: Buff-colored, with
abundant Nummulites boninensis, Alt•eolina jamnus Yar., and Eorupertia boninellsis. ~anking Beach, Cocoanut Beach.
Shizukazawa. Yumemizaka. Rosudani. Funaki-yarna, l\cnbutsu Pass,
Sakai-dake . . . . . . . . . . . . . . . . . . . . . . . . . . 16
(Rosu-ishi. the G/obigerina limestone
may be referred to a deeper facies ofthis tuff, which has been suggested
as a shallow-water deposit of lessthan 200 meters depth. in Yabe's studyof some arenaceous Foraminifera
encrusting the surface of N11mmulites
tests.)
2 Tuff: \Vhite .
. .. .. .. .. .... .. .. .. .
1 Andesite basement. rock"7

Concerning these Eocene rocks HANZAWA (foe. cit.) added that: "The Eocene
beds are locally intercalated with someandesite lava in several horizons. except
theuppermost Bip!anispira-limestonewhich is destitute of pyroclastic material.
This fact suggests that the Yolcanic activity that took place in the Lutetianage, during which the .".iummulites-bearing beds were deposited. ceased before
the Priabonian age. in which the Biplanispim-limestone was formed."
Among the rock samples collected fromthe_.ll beds described by HA~ZAWA. four
were washed for the present study,
namely Nummulites tuff, Rosu-ishi !alocal name of the G/obigerina limestone 1
quarried for building stone). DiscocyclinaAlt•eolina tuff.'and G/obigerina tuff. And
except for the Discocydina- A.h•eolina tuff,
the other three yielded smaller Foraminifera. The localities and some remarkson the lithology of the three samples
which yielded the foraminiferal fauna
studied are briefly summarized as follows.
Nummulites tuff :-Shizukazawa, Okimura, Haha-jima (Hillsborough Island).
Light brown. tuffaceous fine grainedsandstone with abundant tests of Nummulites bonineusis HANZA\\'A (330 specimens in 100 g. rock sample).
Rosu-ishi :-A quarry at the entrance of
Rosu-dani (Rosu-valleyl, northeast of
Oki-rnura, Ilaha-jima. Hard compact\Vhite limestone made up largely of
foraminiferal tests. Stratigraphically,
it is supposed to be a deeper water
facies of the Nummulites tuff above
mentioned.
Globigerina tuff :-The sea cliff of Onion
Beach, at the east side of the small

426.

Eocene Planktonic Foraminifera from Halza-]ima

embayment of Oki·mura. Haha-jima.
Light greenish gray tuffaceous compact
medium to fine grained sandstone.

After treatment by the hard-rock maceration method using GLAUBEI(s salt. arich planktonic fauna was extracted fromthe residue on the screen with about 100
microns opening. All planktonic forms
and their frequency arc shown in Table

Age, Correlation and Planktonic
Foraminifera
Table l.

~11

Distribution of Foraminifera from Haha-jima (L: left direction. H: right direction).

Nummulites

Rosu-ishi

Tuff

L.

SPECIESR.

• Gfobigeri11a'Tuffi-;---;-

Hanlkenina dumblei WEJ1SZIERL and APPLIN

3

Globorotalia centralls Ct.:SII:\IA:-.l and52

Bl~l~~lliDEZ- - - - - - - - - - - - - - - - - - - - -~-1

39

55

22

20

81

G. ldnwri Cusi!~IA:-.:-; and ]ARVJs

3

2

31

G. spi11ulosa Ct.;SH:\IA:\:"1

9

1<1

31

G. crassata crassala (CUSIJ~IAN:-o:)

16

'--4

G. rrassata densa (CI:sJJl\I.-\:-;1\)5Globigerina collaclea (FJ:-.LA Y)':

G. liuaperla FINLAY-__c_;_tob~'q;t~d--n-.n-a-1•-el-le_z_u_e/_a_n_a_(_H_E_DBERG)

145

'

- - -

Tnmmrotaloides topilensis (Ct'SH\JA;-;~)

G. yaguaensis WEI:->ZI_E_R_L_a_n_d_A_P_P_L_I_~-,_v_a_r.__ ~

1

10

I

- - -

---

--(-_;. -ye-,).;-•11~-;11-S-is-·-\\_.'_JE-~:\-'Z_l_E_R_L_a_n_d_A_PPLIN

7

'

---~-

I
I

-

19
I

17

19

~--~~

1

I

2

-~~-'

·- 7

4

_~_; __12_

1--- ----~---~---

2· - - - - - - - - - - - · --, - .. Globigerilwides" higginsi BoLLI
I
1
1

-1

I

1,

1._1_

_ _

6

9

-~--1

1

·I

~----------·-----.

Splmeroicline/lopsi s senni ( 13 EC K :>.L-\:>; :-;)____G_w_b-ig-e;·a--p-si_s_t_n_ex-,-.c-a_n_a__(C__c_s_H_~-~A-:-;-·:-;-,)--

II

1

47

61

I

I 116

11

I

us

/8

------G. index (Ft::-:LAY)

1

2

Porticu/aspJUJera beckmanni SAITO, n. sp.

I-

Catapsydrax echi11afus BOLLI

I--------------

Weight of Sample (in Gram)

-

-

4

-----~- _1_18_ __Globigerinatlteka barri BR0:-1:->I:>.IA:-.:-<

Planktonic miscellanea (sp. indet.)---·--Total

16

2

4

--- -

I

I

I
i

.

5 '
I

350

20
-------I

50

309

100

1

1283

0.5
--

212

Tstmemasa SAITO

1 with the weight of each rock sample
treated. Except for the Nummulites-tuff.
the planktonic forms predominate overthe benthonic ones in all of the samples.
The planktonic fauna from Haha-jimaconsists of 18 species of which one is
new and they are described in the systematic part. Nearly all of them arefamiliar Eocene planktons and their geologic ranges and geographical distribution are fairly well known by the studies
of previous authors.
By the extensive works on the planktonic Foraminifera from the Eocene Navet and San Fernando formations in Tri·nidad, BoLLI (1957c) established biostratigraphic zonation of the Eocene formations. The zonation of BoLLI has been
currently used in the Eocene biostrati·
graphy as a tool for interregional correlation. In the middle to upper Eocene,seven zones were recognized in ascendingorder. namely Hantkenina aragnmmsis.
G/nbigerapsis /mgleri, G/nborotalia ldmeri.
Pot1iculasp/wera mexicana, Tnmcorolaloides mhri. GlobiJJerapsis semiim•olula. andGloborotalia cocoaensis Zone. As discussed
later in the systematic part. howe\'er,some changes are made on the species
Porticulasp/iaera mexicana \CVSH~IAN) of
BoLLI eta/. (1957) and G/nbigerapsis lmr.;leri
BOLLI, LOEFILICH and TAPPAN. G/obigcmpsis /mg/eri of Bo1.1.1 et a/. is considered to
be a junior synonym of G/obigerina mexicmza CusH~I A:\ and therefore the hypotypes referred to CusiL\!AN's mexicanaby them are an undescribed form to which
the new name J>orticulasp/wera beckmanni
is here proposed. Accordingly it seems
that the zone names of G/obigerapsis
kugleri and Porticulasplwera mexiama of
BOLLI {loc. cit.) should be emended hereafter for the newly designated name ofthe species which represents the typesof BOLLI eta/., namely Globigerapsis mexi·
cana for G/obigerapsis kttf{leri and Porti-

wlasjJ/lllera lwckmmmi for Pnrlimlasphaera mexica na.
As already stated, the Nummulites· bearing rocks in llaha-jima were considered
to be Lutetian (1Iiddle Eocene) in age
except for the Bip!anispim limestonewhich is Priabonian (Upper Eocene) based
upon the larger Foraminifera (liA:'\ZAWA,
loc. cit.) and which yielcled no smaller
Foraminifera.
The planktonic faunafrom the lower three beds. however, isdifficult to subdi\'ide and it should beconsidered as comprising a single unit. In
the ~vummulites tuff, the planktonic assemblage is very poor in number andkind of species. probably due to someecological conditions during deposition ofthat bed.
Considering the geologic rangc·s of eachspecies and the present faunal assemblage. this fauna is evidently correlatiYe
with the " Porliculasphaem mexicana ..
(=P. beckmanni) Zone of Trinidad (BOLLI,
loc. cit.). This zone is defined by the
first appearance of Globoquadrina venezuelana (HEDBERG), the extinction of Glo·hnrota!ia sjJinu!osa CUSIIMA:>: and Tum·rnrotaloides topilensis (CUSIUIA:-\1 at the
top. and by the restriction of J>orticulasplwem bl'ckmauui. n. sp. {=P. mexicana
110LLI. et a/.) to it.
The P. beclmwnui
Zone is now considered to represent a
part of the middle Eocene (Lu tetian) inage. The Lutetian age of the present
fauna coincides with that indicated by
the larger Foraminifera and upheld by
the occurrence of Hantkenina dumblei
which is a characteristic middle Eocene
species (TIIALJ\IA:\1\, 1942b: BIW:\:\I~IA!\:\,
1950). Thus the fauna from the Eocene
rocks in llaha-jima is closely related withthat of the Navet formation in Trinidad.
In the northern hemisphere of the
Pacific pro\·ince. the genus Jfantkenma
which was believed to be restristed to
the Atlantic prior to 1932, has been re-426.

Eocene Planktonic Foraminifera from Halza-]ima

corded from islands of Rota m.\NZAWA.
1957\, Saipan, \Iariana Islands (TODD.
1957). Mid·Pacific seamounts 1 1L\~IlLTO:-i.
1953l. Eniwetok Atoll (Toon and Low.
1960) and East Borneo !TII.·\L\IA:"\:-.J. 1912a).
Either lfantkenina alabammsis or the
species supposed to be an upper Eocene
form have been described from all except
the last mentioned island. The present
discovery of Hantllenina dumblei. a middle
Eocene form in llaha·jima added a new
locality of the species in the nonhero
Pacific province.
All Lhe types here described arc desposited in the lnstiltHe of Geology andPaleontology, Tohoku University. The
prefix IGPS to the catalogue numbers is
an abbreviation for Institute of Geology
and Paleontology, Sendai.
Systematic Descriptions

Family I Iantkeninidae
Genus Hanlkenina CliSH\1:\1\'. 1924
Han!lu.:nina dumblei WEI~ZIE!n and
APPLI:\, 1929
Plate 32. ligures 5-7

Hantkenina dumblei WEI:'\ZIERL and APPLIN.
1929. p. 402. pl. 43, figs. 5a, b (Jide ELLIS
and :\fESSI:"A. 19-!0 et seq.): SIIOKHI:'\A.
1931. p. 437. pl. 2. figs. 12, 13 (reproduced
from WEI:'\ZIEIH. and APPLI:'\): REY, 1939.
p. 3z.l. pl. 22. figs. 10 -12. p. 329, lext·figs.
c. d; T!IAL~IA:"'N, 1942a, (no ligures) ;BOLl. I, LOEBL!Cll ami TAPPA:>:. 1957, p. 2628, pl. 2. figs. 5a-6 (lectotype designated).
Hantkenina cf. dumblf'i WEI:-IZIERL and APPLI:-1. CusH'-IA:-1 and S!Ec:n:s. 1939, p. :l2,
pl. 7, fig. 2.

Hantkeuiua (A.ppliuella) dumblei WEI:>:ZIERL
and :\PP!.IN. THAI.:\IA:'\:-1. 1942b, p. 812,Sl-1. pl. l, f1gs. 2a, b (reproduced from
\VEJ:-IZIERL and Al'l'LI:-1) : BR0'-11"1:-.IA'\N,
1950. p. 408-410. pl. 55, figs. 11, 18, 22-2-!.
pl. 56, fig. 5.

Hantkeui11a (A.pplinella) cf. tlumblei \VEI:-;ZIERL

and APPLIN.
text-figs. 1 ·L

CRESPI:"~,

1958. p. 317-319,

Remarks :-This characteristic middle
Eocene form is easily distinguished byhaving the five to six chambers longer
than broad, a triangular shape with along. slightly curved frontal line; thespines placed at the anterior angles of
the chambers, just below the sutures;
sutures radial, slightly depressed andeither straight or sigmoidally curved.
This species \\·as originallr describedfrom the middle Eocene Yegua formationof Texas. Since then. it has been recorded from many remote localities. namely
Trinidad, ;vJorocco. North Caucasus,
East Borneo, western Australia. California etc. The present occurrence in thenorthwestern Pacific region is very interesting in considering Lhe Eocene paleogeography and the distribution of thisspecies. Only from the Globigerina tuff,
fragile but fairly well preserved specimens are rarely found. The size ranges
from 0..15 to 0.83 mm. in maximum diameter without spines.
flypo!Jpes :-IGPS coli. cat. no. 79000a·c
from the G/obigerina tuff.

Family Globorotaliidae
Genus Globorotalia Cusm.IA~. 1927
Globorotalia centra/is CUSH:\IAN
and BER'.IUDEZ, 1937
Plate 33, figures la-2(;{oborotalia CCilfra/is CUSII:\IA::\ and BER:\IUDEZ,
1937. p. 26. pl. 2. figs. 62-65: HowE. 1!!39,p. 84. pl. 12, figs. 4-6: BERGQUIST. l!J-!2,
p. 97. pl. 9. figs. 3!. 36, 37; STAI:-:FORTII,
1948. p. 118. pl. 26, figs. 21-29: HA~llL·
1953. p. 229. pl. 32, fig. 8; BECK·~IA:"N, Hl5·1, p. 396, pl. 26, figs. 8. 9, textfig. 21; TODD. 1957. p. 2(i8 (table), pl. 71,
figs. la-C, 3a-c:
BOLLI, LOEBLICII andTAPPA:>:. 1957. p. 41, pl. 10, figs. 4a-c (re-TON,Tsunemasa S.·l!TO

21-1

Globorotalia aassata crassata(CUSHMAN), 1925

sin ~le spiral view. The present. specimens are identified with this species. In
1925. Ct:SIL\IA:'\ diYided Pul1Jinuli11a erassa/a into two species, namely Pulvinulina
crassala (s. s.) and r. crassala var. deusa.
Pull'inu!ina crassufa (s. s.) is herein treated as Globorotalia aassata crassata andit differs from G. crassata densa in having more rhomboidal equatorial prolilc
and more numerous chambers visible on
the spiral side. Considerable variations
are found in this species with respect tothe angl.:! of periphery which is very thinalmost keel-like to sub-rounded, and therate of increase of the chambers. This
species occurs in abundance in Haha-jimaand sho\\·s the tendency of 1he coiling oftests which become strongly to the left
in the younger deposits. The size ranges
from 0.22 to 0.43 mm. in maximum diameter.
flypotypes :-IGPS coil. cat. no. 79002a.
b from the Nummulites tuff.

Plate 33. figures 3a-4c( ;fuborola/ia 1·rassa!a de usa

production of holotype) : BoLl.!, l!J57r.·,
p. 169. pl. 39. figs. la--l: Tooo and Low,
1960 (part). p. 850. pl. 259. figs. 10a-llc(not figs. 12a-c): SotTRDILLOS, 1960, pl.
2. figs. 29-31.

Cloborotalia (Turbomtalia) centrali.~ Ct'Sl!MA!\and BER:I.ICDEZ. CcsH:I.L\:-> and l3ERMI>
DEZ. 19-19. p. 44, 45, pl. 8. figs. 19-21.

Remarks:-The large specimens of thisspecies frequently occcur in the present
material. As stated by Bout lfoc. <:it.).
this species shO\YS considerable variationin the number. shape and spiral arrange·
ment of the chambers.
High spired
forms are rather rare. The coiling of
the test is a strong- preference to theleft direction. The size ranges from 0.36
to 0.63 mm. in maximum diameter.
ffypotypes :-IGPS coli. cat. no. 79001a.
h from the Globigerina tuff.

(CUSIL\IA:->), 1925

Puh•i11uliwt crassata Ct'SH!'-tA:-o:. 1925b, p. 300.

!'late 33, figures 5a-6b, lOa-llc

301. pl. 7, fig. 4.

(;loborotalia r:rassata (CIISIHIA:\). COLE. 1927,
p. 3-!. pl. l, figs. 7. 8: CUSIHI.·\:--1 nnd BARKS·
DALE. 1930. p. 67. 68, pl. U, figs. 7a. b ;HowE. 1939. p. 8-!. pl. 12, figs. 7-9; Ccsl!·
MAS, 1939, p. 74. pl. 12, fig. 19: CUSH:I.IA:"land API'LI1\. 1943. p. 44, pl. 8, figs. lOa.
b: CcsmiAN and RE:-;z. 1948. p. 40. pl. 8,
figs. 5. 6; H.\:I.IIL TO~. 1953. p. 229. pl. 31,
figs. 17. 18, pl. 32. figs. 1-3: Bt,CJ..::I.J.\:"(:--1,
1954. p. 396, 397, pl. 26. figs. 10, 11. text·
fig. 22.

Globorotalia (Tru1k'orotalia) crassala(CusH-

1\IiL'\). Ct:SH!\1.\:-1 and BER~tt:!>l-:z, 19-19,
p. 37. pl. 7, figs. 4-G.
Globorotalia lmltbrooki BoLLI. 195ic. p. 167. pl.
38. figs. 4a-5c.

Globorotalia densa (Ct'SII:I-1.\:\).

PESSAG:--;o,1961. p. 356, pl. 1, figs. 1-3.

Remarks :-When Cusm.rAK (toe. cit.)
proposed this species, he figured only a

P11fl·imrliua

cras.~ata

Ct:su:-.rM>

\·ar.

densa

Cr.:smtA:-;. 1925/J, p. 30! (no figures given).

Globorotalia crassata (CJjSHMA=') Yar. deusa(Cl:sn:.tAx). CoLE, 1927, · p. 34. (listedonly) : Ct:sH~I:\N and B,\t~r<SDAI.E, 1930,
p. liS. pl. 12. figs. Sa. b; Cusu~IAX. 1939.
p.
75. pl. 12. figs. 20a, b.

nGloborotalia (Trrmcorotalia) crassata (Cusu\IA!'i) Yar. densa (CusH:viAN). Ct:SHl\IAX
and BER~I!;DEZ, 19:19. p. 38, pl. 7, figs. 10,
12. 11 (?).

Globorotalia crass:zta de-11sa (Ct:sll~tA:-.:). HA!\IIL·
TO:-:.

1953, p. 230, pl. 32, fig. 4.

Globorotalia crassula Ccstt:VIAN and STEWART.
1:3ECI(~IAXt". 195-1, p. 397. pl. 26, fig. 12 (notof CUSH:I.IA:" and STEWART).

Globorotalia crassata var. de11sa (Ct.:SH!\1.\K).
ToPD and Low, 1960, p. 850, pl. 259, figs.

13a-c.

Remarks:-This subspecies differs from

426

Eocene Planktonic Foraminifera from Halza-}ima

the typical one in having more compact
form. usually four chambers in the lastwhorl. sub-rec~angular equatorial profile.
and the more rounded periphery. It occurs as commonly as the typical one in
the present materials and also has thetendency to left coiling in the younger
horizons. The size ranges from 0.2•1 to
0.34 mm. in maximum diameter.
Iiypotypes :-IGPS coli. cat. no. 79003a-d
from the G!obigerina tuff.
Globorotalia lelmeri CUSH:\IA:\and JARVIS. 1929
Plate 3:!. figures ll~. c:

Globorotalia lclmeri CL'sii~IA'\ o.:,d 1 \K\'1:>.
1929. p. 11. pl. ::i. figs. Hi:1-c: Ctsii~L\'\and Rt·:;-.;z. 1948. p. 40. pl. 8. tigs. 3. 4:
CusHMA'\ and BER~Il'DEZ. 19-l!:J. p. 32. pl.
li. figs. 7· 9:
figs. 9:t-13.

BOLLI. 1957c. p. 16£. pl. 38.

Remarks:-The forms transitional between this species and G/obom/a/ia spinu!osa are also found in the present materials as in the Navet formation 1130LLI.
Zoe. cit.). The test of this species. ingeneral. is more compressed. nearly equ·ally biconvex. and with weaker keeled
periphery than G. sjJillulosa. The coilingof the tests shows slight preference tothe left. The size ranges from 0.27 to
0.48 mm. in maximum diameter.
!iypotype :-IGPS coli. cat. no. 79004
from the G/obigcr:ua tuff.
Globorotalia spimelosa C(jSH:\lAJS. 1927
Plate 33. figures 9a-c.

Globorotalia spinulosa CusmtA1". 19271;:, p. 114.
pl. 23. figs. 4a-c: COLE. 1927. p. 31, pl. 2.
fig. 9; HowE. 1939. p. 85, pl. 12. tigs. 1012:
Cusm.tA:-;. 1939. p. i5, pl. 12, figs. 2la-c:
FRANI<LI:-.'. 1944, p. 318. pl. 48. fig. 8:
J3ECI\~IAN:", 1954. p. 397, 398, pl. 26. fig.
13. text-fig. 23: Tooo. 1957. p. 268 (table).
pl. 71. figs. 2a-c: BOLLI, 1957c. p. 168. pl.

215

38. figs. 6a-7c.

Globorotalia (Tnmcorotatia) spinulos<J CcsHMA'\. Ct:sH~JAN and BERMl"DEZ. 1949. p.
40. 41. pl. S. tigs. 1-3.

Remarks :-This species differs fromG. lelmeri in having an umbilicoconvex
test. instead of a nearly equally biconvex
one as in the latter. l!sually this species
shows a dense and more spinose thickened keel than G. le/meri. The coilingof the tests show a preference to the left.
The size ranges from 0.20 to 0.53 mm. in
maximum diameter.
Hvpotype :-ll;Ps coiL cat. no. 79005
from the Glubigerina tuff.
Genus Trrmrurotaloides BIW~~~~!A"'l'and BER\!UDEZ. 1953
Tnmcorotaloides topi/cusis(CUSliMA:'\i.

1925

Plate 33. figures S:t-c

GlobiKerina topi/eusis CL'sHI\1.\:'\. 1925a. p. 7. pl.
1. tigs. 9a-c: HO\\'E. 1939. p. 84. pl. 12.
ligs. 1-3: WEISS. 1955. p. 309. 310. pl. 2,
figs. 16. 1i: H.-\~IILTO'\ and REx. 1959. p.
792. pl. 252. tigs. 17. 21.

Tnmcorotaloides topilensis (CusH~IAN). Bot.!.!.
1937c. p. 170. pl. 39. figs. 13-16b.

RemaTks :-The Haha-jima specimens
referable to this species are closely related to the hypotypes of 130LLT (toe. cit.)
which was compared by him with the
holotype. This species is characterizedby having a rather lobulate peripheryowing to the greater separation of theindividual chambers. the coarsely hispid
test surface and some sutural supplementary apertures on the spiral side.
This feature of sutural supplementary
apertures is an important criterion which
distinguishes this species from previously known related forms in general ap·
pearance of the adult. In juvenile speci·
mens, however. sometimes these supple·

2Hi

Tszmemasa SAITO

mentary apertures are not clearly observed. The coiling of the test is astrong preference to the left. The size
ranges from 0.32 to 0.5lmm. in maximum
diameter.
Hypot_1pe :-IGPS coli. cat. no. 79006
from the Clohigerina tuff.
Family Globigerinidae
Genus G/obigerina o'ORBIGl\Y. 1826
Globigerina col/actea (FINLAY), 1939
Plate 32. figures 12a-c

G/oborotali:: col/(:clea FI:>:LA Y, 1939b. p. 3:!7, pl.
29. figs. 16-!, 165.
G/obigaimt m!lactea (Fil\LAY). BRol\1\I~t.';.'o:N,
1952b. p. 1:~. 14. pl. 1. figs. 13-15: BOLLI.
195ia. p. i2. pl. 15. figs. 21-23: BoLLI.
195/c. p. Hi2, pl. 35. figs. 18a. b.
Remarl~s :-This species was originallydescribed as a Globorotalia. As noted by
BRoNNJ:\IA:'\:-<, it has an umbilical aperture which is a character of the genus
Globigerina. This species is characterizedby having the last whorl consisting offour to five chambers which increase
gradually in size. but the last one sometimes is equal to or even smaller thanthe penultimate; and a fairly wide open
umbilicus is usual. FIKLA Y described
this species from the Bortonian stage of
New Zealand. According to I-loRl\IBROOK(1958), the Bartonian stage is correlativewith the upper :tvlicldle Eocene. The pre·sent stratigraphic occurrence in I-lahajima coincides with that of this species
in New Zealand. but in the Caribbean
region the range of this species is re·stricted to the Lower Eocene. The coil·ing sho\\·s a supposedly left direction.
The size ranges from 0.24 to 0.33 mm. in
maximum diameter.
I.lypoty}>e :-!GPS coil. cat. no. 79007
from the Nummulites tuff.

G!ubigerina linaperta FINLAY. 1939
Plate 32. figures -!a-c
G/obigeriua /iuaperta FINLAY. 1939a, p. 125. pl.
13. figs. 54-57: BRO:-<NI~L-\:-::-.:. 1952b, p. 16,
pl. 2. fig::;. 7-9: HA~IILT0:-1, 1953, p. 222,
pl. 32, figs. 5. 6: BoLLI. 195/a, p. 70. pl.
15, figs. 15-17; BOLLI. 1951c, p. 163, pl.
36, figs. 5a. b: liORNIBROOK. 1958. p. 33,
31. pl. 1. figs. l9-21 (reproduction of halotype) : S,\ ID and KF.NA \\'Y, 1956. p. 157.
pl. 7. figs. Ia. b.

Remarks:- The specimens referable tothis species occur rarely in Haha-jima.
The coiling of the tests is uncertain
because of thelfew specimens. The size
ranges .from 0.29 to 0.46 mm. in maximum
diameter.
lfvpotype :-IGPS coli. cat. no. 79008
from the Globigerina tuff.
G!obigerina yeguaensis \VEI:'\ZIERL
and APPLIN, 1929
Plate 32. ligures la-3

G/obigeriua yeguaensis WEIJ'\ZIERL and APPLI=".
19~9. p. 408, pl. 43. figs. la. b. (fide ELLIS
and MESSINA. 19-!0. et seq.): BOLLI. 1957c,
p. 163. pl. 35, tlgs. 14a-15c.
Globigerin:r lmlloides o·ORBIGJ\Y (?). Cusii~I.-\:-1
and BARKSIHLF., 1930, p. 6i, pl. 12, figs.
6a, b.
Globigeriua pera Toou. 19ii7. p. 301. pl. 70. figs.
lOa-llc.
Catap.~ydrax unicaL'IIS BoLLI. LOEBI.ICH and
T APP.-\N. BOLLI, 1957c. pl. 37. figs. 7a, b(not of BoLLI. LOI~BLICH and TAPP.\N).
Catapsydrax cf. dissimilis (CUSIIMA?\ and BER·
7\IUDEZ). BoLLI. 1957c, pl. 31. figs. 6a, b.

Remarks:- This species is characteriz·
ed by the well lobated periphery. rather
open umbilicus in which a narrow andlow arched aperture with a fragile but
distinct lip opens. and the inflated andwell separated subglobular chambers. In
addition to this typical form some vari·ants with an aberrant chamber are found426.

E'ocl m P!anlllonic l''oraminijera from Haha-]ima

in association. These forms arc foundto be very similar to either of G. pem
Tmm or to 1he two ·· Catapsydrax" species of Bor.u (foe. cit.). There is considerable variation in the mode of development of the aberrant chamber. In
some specimens this covers entirely theumbilicus as in the case of BOLLI's .. Cata·
psydmx cf. dissimilis ". but in some otherspecimens one slit·like aperture is present
at the inner edge of the supplementarychamber as shown in pl. 32. fig. 3. G!obi·
gerina pem of Tooo .foe. cit.) and .. Cata·
psydrax unicavus" of Bou.r (foe. dt.).
And in some extreme cases this aberrant
chamber covers only less than half of
the umbilicus. The general charactersof the test when this aberrant chamber
was removed. however, do not differ
from the typical G!obigerina yeguaensis
as shown in pl. 32, fig. 2. Even in somedistinct Eocene species as G/obigerapsis
index and ( ;{o/IOrotalia aassata de usa,
such aberrant chambers are also observed.
Further cases and the meaning of theaberrant chamber were discussed in detail elsewhere (TAKA \'A);AGI and SAITO,
1962). The stratigraphic occurrence of
these Eocene "Cataps_wfrax "-like forms
seems to coincide well with the range of
G/obigerina yeguaensis. Consequently thewriter considered a part of these Eocene"Catapsydrax "-types with an aberrant
chamber to be a variant of G. yeguaensis.
In this point of \·iew, further investigations seem to be necessary on the genus
Catapsydrax. In this article the forms
with an aberrant chamber are distinguished from the typical only in the distribution chart as a variety of this species without taxonomic status.
This
species shows a slight preference to rightcoiling. The size ranges from 0.31 to
0.54 mm. in maximum diameter.
Hypotypes :-IGPS colt. cat. no. 79009,
79010a, b from the G!obigerina tuff.

217

Genus Globoquadrina FINLAY. 1947
G/oboquadrina l:enezue!al/a(IIEDDERG), 1937

Plate 34. figures 9a-10

Globigerina renezuelmw HEDUEK•;. Hl37, p. 681,
pl. 9~. figs. 7a, b; Ct'SH~I.\1' and STAll'\·
FORTH. 1945. p. 67, pl. 1~. ligs. 13a, b;
HA~IILTO=". 1953. p. ~23. 224. pl. 30, fig. 3;
WEt:;s, 1955. p. 310, pl. :.!, figs. 18-20:
BOLLI. 1957/J, p. 110. pl. 23. figs. 6a-8b;
BoLLI. 1957c. p. 164, pl. 35. ligs. 16a-17;
H.·\'-IILTOX and REX. 1959. p. 792, pl. 253,
figs. 15, 16.

Globigerina cmzglomerata~IAXX.

ScHW.·\l;EK.

BECK·

1954. p. 391. pl. ~5. figs. 6-9, teXt·

fig. 15 (not of ScH\\'A<;ER).
Gtoboquadrina z•encznelcma (HEDBERG). BLow,
1959. p. 186. pl. 11. figs. fiSa ..:. 59.

Remarks:- This species was referred to
the genus C/oboquadri11a FI:\I.A Y at thetime of its proposal. BoLr.r Uoc. cit.) and
BLow (/or. cit.) discussed some variationsof this species and Br.ow upheld theview of FINLAY. In some Eocene forms apointed umbilical tooth is found at thebase of the final chamber (pl. 34, llg. 10).
In Haha-jima, rather large forms occur
fairly commonly in association with flantkeniua dumblei. The coiling of the tests
is random. The size ranges from 0.26 to
0.63 mm. in maximum diameter.
HJPotypes :-IGPS coli. cat. no. 7900lla,
b from the G/obigerina tuff.

Genus Globigerinoides CUSII:\1.\);, 1927.. Globigerinoides .. higginsi BoLI.I, 1957
Plate 34, figures Sa. b•· Globigerinoides" l1iggi11si BOLLI, 1957c, p. 164,165. pl. 36, figs. lla-13b: Pr·:ssAGI"O, 1961,
p. 356. pl. 2. fig. H.

Remarks :-The rare but well preserved
specimens in the present materials are
identified with the species of Bou.I.
This species is distinguished by the veryTswzemasa SA1TO~18

high spiral arr;mgement of its chambers
and some supplementary sutural apertures on the spiral side. But in the earlier
whorls the supplementary apertures arevery obscure or not ob.served. Becauseof its small size and the rare occurrence.
further study is rese:-ved for future opportunity concerning the generic positionof this high spired species.
All thespecimens show right coiling. The size
ranges from 0.~4 w 0.31 mm. in maximum
diameter.
Hypotypes :-IGPS coil. cat. no. 79012
from the G/obi;;nina tuff.
Genus Sphaeroidinellopsis BA:'<:\ER
and BLOW. 1959

Spilat?roidillel!opsis sw:r'
IBECK1\IAC\N). 1934
Plc.re 3·t :lgures 3.:c-5b

Splureroidinella sc•mi BECK:VI.~K:"'. 193..1. p. 394.
395. pl. 26. tigs. 2-4. text-fig. 20.

G!obigerina se;zni (Bt:o::I.IA:\N). Bou.1. 1951c.
p. 163. pl. 35. figs. lOa-12.
Sphaeroidina greddcnsis CooK (sic=Sphaeroidiua gredale11.~is M.-\LLORY). M.\LLORY.
1959. p. 248, pl. 22. figs. lOa, b. pl. 34. figs.
4a. b.

Remarks:- This species was originallydescribed as a Sphaeroidinr>/la. But BOLLI
transferred it to the genus Globigerina.
laying stress on the absence of sutural
supplementary apertures and chamber
flange in this species. The absence orpresence of supplementary sutural apertures. howe\·er. seems not to be a consistent character of Spltaeroidiue!la. In
the works of BOLLI eta!. (1957) and BOLLI(l957b), such forms without these accessory apertures as S. seminulina and S.
rutschi were included in the same genus
Sphaeroidinella, though these species
were later referred to the new genus
Sp!zaeroidine/lopsis by and of BAJ.\NER and

BLow ( 1959). In Sphaeroidinella dehiscens,
the type species of the genus. fairly wide
variations in the development of supplementary sutural apertures are observed.
In the populational study of Splzaeroidinella dehiscens from the Globigerina ooze
(collected at the Lat. 2'50"5" N ., Long.
133'5-l' E. by the S. S. Nlanshu in 1925),
it was found that the specimens Jessthan 0.42 mm. in maximum diameter had
no supplementary aperture other thanthe primary. On the other hand, thewell developed crenulate flanges with the
apenural margins are observed in thepresent specimens as well as in the typefigures of BECIOIAK:\ (loc. cit.) and of
BoLLI (l957c, pl. 35. fig. lOa). Concerning
this ap~rtural ornamentation. BECK.\'IA::'\C"\
stated: " !VIt.i.ndung im Umbilicus. durch
hockerige AuswUchse der ventralen Kammerrander Yerdeckt ... Such "tentacular"like flange bordering an apertural opening along its margin is not observed inany species of Globigerina. In some specimens the exterior surface of the laterchambers is smooth and somewhat glassy
in appearance. From the foregoing features the writer considered this species
to belong to the genus Sphaeroidinel/opsis
because of the absence of supplementary
sutural aper lure in the adult. This species occurs in abundance in the present
materials and shows nearly random coiling. The size ranges from 0.22 to 0.48
mm. in maximum diameter.
Hypotypes :-IGPS coli. cat. no. 79013a-cfrom the Globigerina tuff.

Genus Globigerapsis BOLL!. LoEBLICH
and TAPPAC"\, 1957 emended
Type sp:::cies here designated: Globigerapsis
me.r:ica11a (Ct;SH:I.IA:\) ( =Globigerin~ mexicmza
Ct.:sH~IAK. 1925a (here emended)) =Giobigerapsis kug/eri BOLLI. LOEBLICII and T APPA:-1,
1957 (Type species by original designation).

426.

Eocene Planktonic Foraminifera from Halza-]ima

Test subglobular; early portion trochospiral with subglobular chambers, final
chamber embracing and covering theumbilical region of the preceding coil.
less than a half of the surface of thetest in extent ; primary aperture coveredin adult by an em·eloping final chamber.
which possesses two or more arched
openings at lower margin of final chamber. at intersections with sutures of
earlier whorl.
Remarlts :-Globigerapsis kul{feri BOLLI.
LOEBLICH and TAPPA~. the type speciesof their new genus G/obigerapsis is undoubtedly a junior synonym of G!obigerina mexicana CUSIL\IAt\ 1925 as discussed
below. Accordingly. the type speciesof the genus Globigerapsis is here substituted and emended as G!obigerapsis
mexiuma \CUSH:O.IA~).
This genus differs from Porticulasp/zaera in not haYing the inflated strongly
enveloping last chamber larger in size
than the entire previous portion of test
and the multiple sutural apertures aroundthe lower margin of the final chamber.
at the contact with the sutures of theearlier whorl. This genus does not show
the multiple apertures on earlier chambers as noted in Globigcrinoides and Por·
tintlasphaera.

G/obigcrapsis mexicana (Cl!SI!MAN).
1925 emended
Plate 34, ligures 6a-7c
Globigeriua mexiccna CtJstt~tAX, 1925a, p. 6. 7.
pl. 1. figs. Sa, b: Ct;smtAX. 1927/J, p. 168.
pl. :26. frgs. 16. 17 : CoLE. 1928. p. 218. pl.
2. fig. 11; ST.\1:'\FORTH, 1958. p. 23-25.
text-figs. l-3: WEISS, 1955, p. 309. pl. 2.
fig. 15: .MALLORY, 1959, p. 2-19. pl. 22.
figs. 9a·c: Tooo and Low. 1960. p. 8-18.
pl. 259. figs. 6, 7.
Globigeriual/u>ka barri BROXXJ:-.t,\:-;:--;, 1952a(part). p. 27. 28, text-figs. 3d-f (not fgs.
3a-c. g. h).

219

Globigerinoides mcxicana (CL•SttMAx). HA:>.liL·
TO:->, 1953. p. 22-1. pl. 32, fig. 27: BECK·~tA:->X, 1954 (part). p. 393. 394. pl. 25. figs.
15. 17 (not figs. 16, 18. Hl.)
Gfobigerupsis kugferi BoLL t. LOEBLtCJt and
TAPPA:>:. 1957, p. 3-!. pl. 6. tigs. 6a-c; BOL·
u. 1957c. p. 165. pl. 36. figs. 2la, b.

Test subglobular. early portion trochospiral. final chamber considerably larger
and somewhat embracing, CO\'ering urn·
bilical region of early coil, but less thana half of sur fact> of test in extent; aboutfour chambers in each whorl but usually
three equally sized chambers in lastwhorl ; sutures deeply depressed. incised.
radial to curved ; wall calcareous. coarsely
perforate, finely spinose. but usually sur·face spines broken into rough surface;
primary aperture covered in adult by
final somewhat enveloping chamber
which has two or more arched sutural
supplementary apertures. each bordered
by a slight lip, in earlier whorl secondary
apertures obscured or absent.
:'vlaximum diameter of figured hypotypes 0.34 and 0.53 mm. Other specimens
range from 0.22 to 0.55 mm. in maximum
diameter.
Remarks :-In 1957. BoLLI, LOEBI.ICH
and TAPPA:-\ proposed a new genus Por·ticu/asplwera w i l h Globigerina mexicana
CUSHI\IA:-\ as the type species. based on
the forms with the final chamber which
entirely covered more than a half of thetest and with multiple sutural supplementary apertures around the lower
margin of the final chamber. at the contact with the sutures of the earlier whorl(BOLLI e/ a!.. toe. dt.). However. although
Portiwlasp/wera of BOLLI el a/. is based
upon CUSH:VIA:-.l's original mexicana. thecharacters are different from their generic diagnosis. From the original figuresof CUSIII\IAN as well as the subsequent
good figures of his topotype or paratype
specimens from the type locality (CUsH-

220

Tsunemasa SAITO

l'I!A~. 1927b) and also of STAI~FORTH (toe·cit.) it is evident that the forms of CusH1\IA~·s mexicana do not have the chamber
covering the earlier chambers in areal(larger in size than the entire previous
portion of the test) and the multiple
sutural supplementary aperture aroundthe lower margin of the final chamber.
From these features, the type species ofForlieztlasphaera of BOLLI et al. should begiven a new name, since it represents a
new species for which the name of Forti·
culasp!wera beckmanni is here proposed.
On the other hand. the type species of Glo·bigerapsis BoLLI, LOEB!.ICH and T AI' I' A:\.
is conspecific with CUSHMA:\'s original
mexicana and is therefore a junior synonym and the type species of that genus
becomes CUSHI\IA:\·s original mcxicana.
From the viewpoint of Zoological Nomenclature the newly proposed generic nameof BOLLI et al.. Fortirulasp/l{rera. wasbased upon an undescribed species but
the genus now actually includes several
other species. For this reason. choiceshould be made between selection of thesecond named species of the genus as thetype species or of the new name given

to replace the type species of BOLLI et
a!.. or a new generic name should beestablished to include species agreeing
with the generic diagnosis. Since Forti·
culasp/zaera was not based upon syntype
or cotype materials. no lectotype can be
designated, and selection of the second
named species is impossible. and therefore a new generic name should be proposed into which the newly named specific name for the Lype species of Bor.u
et al. is to be included. To avoid confusion and to abide with the laws ofInternational Zoological Nomenclature,
the species Fmticu/asplwera beckmmmi
is here designated as the type species of
PorliculasjJ!taera, of which description is
given under the genus Forticulasphaera.
Types :-Holotype (CUSH'\!A:-\ coli. .t33.f)from the upper Eocene Tantoyuca formation. Vera Cruz. l\lexico. Herein figured
hypotypes (lGPS coli. cat. no. 79014a. b)from the Globigerina tuff. Onion Beach,Okimura, 1-laha-jima.
Globigerapsis index (fiN LAY), 1939
Plate 32. figures 9-lOc

Explanation of Plate 32(All figures x 68:

a. umbilical view;b. spiral view : c. side view)Figs. la-3. Globigeriua yeguaensis WEJ:'-IZIERL and APPl.l=". 1. hypotype (IGPS 79009). 2, umbilical view of hypotype showing the form removed of a bulla-like abe!-rant chamber(IGPS 79010a). 3. umbilical view of hypotypc with:an aberrant umbilical chamber (lGPS
79010b).
Figs. 4a-c. Globigerina liaaprrla Frr-;J.AY. Hypotype (IGPS 79008).
Figs. 5-7. Hantkenina dumblei WEII\ZIERL and APPJ.J:-;. 5. side view of hypotype (IGPS 79000a).
6, side view of hypotype (IGPS 79000b). 7, side view of hypotype (IGPS 79000c).
Figs. Sa. b. Globigerinatlzeka barri BRol':-;J~L\r-;:-.1. Sa. umbilical side showing supplementarybulla (IGPS 79015a). Sb, spiral view.
Figs. 9-lOc. Globigerapsis index FJ:-;LA Y. 9, umbilical view of hypotype \Vith a supplementarybulla covering an apertural opening (IGPS 79015a). 10, hypotype (IGPS 79015b).
Figs. lla-c. Globorotalia lelmeri CusH~lA=" and ]ARVJS. Hypotype (IGPS 79004).
Figs. 12a-c. G!obigerina coflaclea FI="I.AY. Hypotype (lGPS 79007).

SAITO:

Eocene Planktonic Foraminifera

Plate 32

426.

Eocene Planktonic Foraminifera from Ilalza-/ima

G/obigerinoides index FINLAY, 1939a, p. 125, pl.
H. figs. 85-88: BECKI>L\:'\'>, 1954. p. 392.
pl. 25. fig. 14: Tooo, 1957. p. 268 (table),pl. 70. tigs. 5-I: HoR:xmRooK. 1958. p. 3-1,
pl.l.ligs.ll-14 (reproduction of holotypc).
Globigerapsis index (FI:-:LAY). BoLLI. 195ic. p.
165. pl. 36, Jigs. l-la-18b: SOCRDI!.LO'>.
1960, pl. 2. figs. 30-41 ; PESSAG:"O. 196),
p. 356. pl. 2. figs. 15-17.

Remarks:- This chracteristic species
occurs rarely in the present materials.
It is distinguished by its globular testin the adult stage and supplementary
sutural aperture on the spiral side. usually three fairly large chambers consistof the bulk of the entire test in themature stage. and in three chamberedforms a larger main aperture is placed
symmetrically with respect to the inter·
cameral suture between the penultimate
and antepenultimate chambers. Coilingof the test is a slight preference to theright. Some forms with an umbilicalbullae are found rather rarely and oneof them is tlgured in pl. 32, fig. 9.
Hypotypes :-IGPS coli. cat. no. 79015a,
b from the G/obigerina tuff.
Genus Portint!asp/waa BoLLI, LOEBI.TCH
and TAPPA);, 1957 emended
Type species here designated : Porliculasp!taera beckmanni SAITO, new species.

Test subglobular. early portion trochospiral. final chamber inflated to almost
spherical. and strongly enveloping, morein extent than the entire previous portionof the test. coyering the umbilical regionof the early coil ; sutures depressed. radia! to cun·ed: primary aperture in theearly portion interiomarginal umbilical.
covered in the adult by a large enveloping final chamber. around the lower margin of the !Ina! chamber multiple sutural
supplementary
aperturesdeveloped,
secondary sutural apertures also ,-isibleon the spiral side of the early coils as
in Globigeriuoides.
Porticulasphaera bel'lzmamzi
SAITO, n. sp.
Plate 3-t figures la-2

Globigeriuoides mcxicana CUSIHL-\:'\.
B"cK1\IA:--::'\. 195-1 (part). p. 393, 394. pl. 25. figs.
18. 19 (not figs. 15-17).
Porticulasphae-ra mexicana (CcsH~L-\:'\). BoLLI. LOEBL!CII and TAPI'AN. 1957. p. 35.
pl. G. figs. 8-!lb: BoLLI. \9S7c. p. l(j5, pl.
37, figs. 1a. h.

Test free. subglobular. early portion
low trochospiral. ,,-ith five to six chambers per whorl. last chamber subglobular,
inflated and strongly embracing and enveloping umbilical region of early coil.
more in extent than a half of entire test;
sutures usually distinct. depressed andsomewhat incised: wall calcareous. comparati\'ely thick. coarsely perforate: primary a pert urc in early portion interiomarginal. umbilical which is covered bylast em-eloping chamber with smaller
multiple secondary apertures around its
lower margin. secondary sutural apertures also visible on spiral side of early
portion as in Globigerinoides. !viaximum
diameter of holorype 0.60 mm., para typeOSl mm. Other specimens range from
0.44 to 0.62 mm. in maximum diameter.
Remarks :-As noted under Globigerapsis mexicaua. this species was describedfrom the Oceanic formation of Barbados
as Clohigerinoides mexicaua (CFSIDIAN) by
BECK~IA);); and as Pm1iculasp!Jaera mexicana (CUSH~-1:\:-\ l by BOLLI et a!. and
BoLLI from the Eocene :\a vet format ion,
Trinidad. But the characters are different from CUSH~n:-;·s original mexicaua
and this new name \Vhich represents the
hypotypes of BOLLI et a/. and of BECKMAl'\:\ is here proposed.
P. beckuumni
SAITO. n. sp. differs from GlolJigerapsis

222

Tsunemasa S.4ITO

mexicana (CUSH\IAN) in having the inflated hemispherical last chamber enveloping the umbilical region of the earlycoil. larger in size than the entire previous portion of the test. and the multiple sutural supplementary apertures
around the lower margin of the lastchamber, at the contact with the suturesof earlier coils. It is also distinguishedby the secondary sutural apertures on
the spiral side as in Globigeriuoides.
According to BOLLI (foe. cit.), this species seems to have its range comparablewith his Porticulasp/J((era mexicaua Zone
(herein treated as Porticulasplwem beck·
mmmi Zone) This species is named after
Dr. J.P. BECK\IA~X who first recognized
this species and in honor of his contributions to micropaleontology.
Types :-Holotype. IGPS coil. cat. no.
79016; paratype, IGPS coil. cat. no. 79017
both from the G!obigeriua tuff. Onion
Beach, Haha-jima. .

Genus Globigerinatheka
BRONNniA:\:>1. 1952
G!obigerinatlieka barri
HRONNI:\L\N:-1. 1952
Plate 32. figures Sa, b

Globigerinatheka barri

BRO:"Xl~L-\:-::-:,

1952a(part). p. '.!.7. 28. text-!1gs. 3a-c. g. h (notfigs. 3d-f): BoLLI. LOEBLICH and TAPPAN,
1957. p. 38, pl. 7. figs. 12a-c: BoLLI, 1957c,
p. 166, pl. 37, figs. 8. 9: SOURDILLO:", 1960.
pl. 2. fig. 35.
Globigerina mexica11a CusHMAN. HowE, 1939,
p. 83, pl. 12, fig. 13 (not of CusH~IAN).
Globigerinoides mexicmza (CLISHMA:-:). BECK·:.rA:-:x. 195-1 (part). p. 393. 394. pl. 25, fig. 16(not figs. 15, 17-19).

Remart:s :-This species occur commonly in the present material. It possesses a globular test. in which the early
chambers are trochospiral and the latera large enveloping final chamber covering the previous umbilical side. The
multiple secondary sutural apertures
which are covered by small bulla arevisible on the spiral side. Each of thisbullae has one or more small arched
openings at the intersections with thesutures. In general characters, the forms
removed of these bulla closely resemble
Globigerapsis mexicana tCUSH:O.'IAN). However, they seem to have different stratigraphic ranges as noted in the Eocene
Navet and San Fernando formations of
Trinidad. Accordingly. this species may
be distinct stratigraphically. But further
morphological and stratigraphical studies
on these two species seem to be necessary for the reason that the bullae may

Explanation of Plate 33(Figures Sa-c X 60: all others x68: a, umbilical view: b. spiral view; c. side view)Figs. la-2. Globorotalia centra/is Ct:SIIMA:'>I and BEH~IUDEZ. 1, hypotype (IGPS 79001a). 2, umbilical view of hypotype (IGPS 7900lb).
Figs. 3a-4c. Globorotalia crassata crassala (CusmiA:>:). 3. hypotype (IGPS 79002a). 4. hypotype(IGPS 79002b).
Figs. 5a-6b. lOa-llc. Globorotalia crassata de11sa (CUSII~IA:-1). 5, hypotype (IGPS 79003a). 6, hypotype with an aberrant umbilical chamber (IGPS 79003b). 10, hypotype (IGPS 79003c).
11. hypotype (IGPS 79003d).
Figs. la-c. Catapsydrax echilzqfus Bot.Lt. 1-Iypotypc (IGPS 79019).
Figs. Sa-c. Trmzcorotaloides topilensis (CusmrA:-:). 1-Iypotype (IGPS 79006).
Figs. 9a-c. Globorotalia spi11ulosa Ct·smr,\:". Hypotypc (IGPS 79005).

SATTO :Eocene Planktonic Foraminifera

Plate 33

426.

Eocene Planktonic Foraminifera from Haha-]ima

be an unreliable criterion in taxonomy
as discussed elsewhere. The size ranges
from 0.24 to 0.6'1 mm. in maximum dia·meter.
Hypotype :-IGPS coli. cat. no. 79018 ·from
the Globigerina tuff.
Genus Catapsydrax BoLLI. LOEBLICH
and TAPPAN, 1957
Catapsydrax echiuatus BOLLI. 1958
Plate 33, figures 7a-c

Catapsydra:c echinatus BOLLI. 1957c. p. 165. 166,
pl. 37, figs. 2a-5b.

Remarks :-Although rare, the spcci·
mens are found to be identical with thisspecies. It is characterized by having
the chambers slightly compressed witha distinctly spinose surface. Concerning
the generic position of this species, how·ever, it seems that some considerations
are needed as in the case of other Eocene.. Catapsydrax ·· species discussed elsewhere. But it will be reserved foranother occasion because of the few
specimens. All the specimens in thepresent materials show left coiling. The
size ranges from 0.27 to 0.37 mm. in
maximum diameter.
l!ypotype :-IGPS coli. cat. no. 79019
from the Globigeriua tuff.
References
BA:'\KER. F. T. and BLow, W. H., 195!:l. The
classification and stratigraphical distribution of the Globigerinaceae, Part 1. Palaeontology, 2 (1), p. 1-:n, pis. 1-3, text-figs.
1-5.
BECK~!A:"':--:. ]. P., 195-1, Die Foraminiferen der
Oceanic Formation (Eocaen-Oligocaen)
von Barbados, Kl. !\ntillen. Ec!ogae Ceo!.
/Ie!to .. 46 (2) [1953), p. 301-·112. pl. 16-30,
29 text-figs .. 1 table.
BERGQVIST. H. R .. 19·12, Scott county fossils:
Jackson Foramini iera and ostracoda. iliis·

sissippi Slate Geol. Surzo.. Bull., 49, p. 1-146.
pis. 1-11.
BLow, "W. H .. 1959. Age, correlation, and bio·
stratigraphy of the upper Tocuyo (San
Lorenzo) and Pozon formations. Eastern
Falcon. Venezuela. Bull. :lmer. Paleont ..
39 (178). p. 67-251. pis. t-19, text·ligs. 15, charts 1, 2. maps 1-4.
Boi.LI. H .. 1957a, The genera Globigeri11a and
Globorotalia in the Paleocene·Lower Eo·
cene Lizard Springs formation of Trini·
dad. B. W. I. l:. S. Nat. Mus .. Bull., 215. p.
61-81. pis. 15-20. text-figs. 11-13.
- - . 1957b. Planktonic Foraminifera from the
Oligocene·Mioce~e Cipero and Lengua
formations of Trinidad. B. W. I. /hid .. p.
97-124. pis. 22-29. text·fig~. 17-21.
- - . 1957c. Planktonic Foraminifera from the
Eocene Navet and San Fernando formations of Trinidad. B. W. I. Ibid .. p. 155-172.
pis. 35-39, text-figs. 25. 26.
--.' LOEBLICH. A. R .. Jr .. and TAPPAN, H ..
1957, Planktonic ioraminif~ral families
Hantkeninidae. Orbulinidae, Globorotalii·dae. and Globotruncanidae. /hid., p. 3-50 .
pis. 1-11. text.figs. 1-9.
BRoNNI:\IANX. P .. 1!:l50, The genus J/cmlkelliiUl
CcsH:-otA:-l in Trinidad and Barbados, B.
W. I. jour. Paleont. 24 (4). p. 397-420, pis.
55. 56. text-figs. 1. 2, tables 1-3.
- - . 1952a. Globigerinoita and Globigerinalheka,
new genera from the Tertiary of Trinidau. B. W. I. Cushman Found. Foram. Res.,
Contr., 3 (1). p. 25-28. text·figs. 2. 3.
- - . 1952b, Trinidad Paleocene and lower
Eocene Globigerinidae. Bull . .'lmer. Paleon/., 34 (143). p. 1-34. pis. l-3, 1 table.
CoLE. W. S .. 1927. A foraminiferal faunafrom the Guayabal formation in Mexico.
Ibid .. 14 (51). p. 1-47, pis. 1-5.
- - . 1928, A foraminiferal fauna from the
Chapapote formation in l\lexico. Ibid., 14(53), p. 3-33, pis. 1-4.
CRESPI:'\, I.. 1958, The occurrence of Hanl·
kenina in western Australia. Jlicropaleontology, 4 (3), p. 317-319, text·figs. 1-5.
Ct:SHI-1.-\:'\, ]. A .. 1925a. New Foraminiferafrom the upper Eocene of Mexico. Cush·man Lab. Foram. Res .. Contr., 1 (1). p. 4!l, pl. 1.

2~4

Tszmemasa SAITD

1925/J, An Eocene fauna from the Moctc·
zuma river. Mexico. .-lmer. ,4ssoc. Petml.
Ceo!.. Bull .. 9 (2). p. 29S-303. pis. 6-S.
- - . 192ia, Xew and interesting Foraminiferafrom Mexico and Texas. Gus/mum Lab.
Foram. Res .. Contr.. 3 (2), p. 111-119, pis.
22, 23.
- - . 192ib. Some characteristic :Mcxkan fos·
sil Foraminifera. ]our. Pa/eont., l (2), p.
147-172. pis. 23-28.
- - . 1939, Eocene Foraminifera from sub·marine cores off the eastern coast ofnorth America. Cu~lmzan Lab. Foram. Res ..
Contr., 15 (3). p. 49-76. pis. 9-12.
- - and APPL.I7', E. R .. 19.13, The Foramini·
fera of the type locality of the Yegua
formation of Texas. Ibid .. 19 (2), p. 2S-46,
pis. 7. 8.
- - and B.-\RKSDAL.E, J. D.. 1935. Eocene For·
aminifera from l\lartinez, California. Dep.
Geed., Stanford Unir .. Contr .. 1 (2), p. 5573, pis. 11, 12. text-lig. 1.
- - and BERMUDEZ, P. j., 1937, Further new
species of Foraminifera from the Eoceneof Cuba. Cushman Lab. Foram. Res., Cmztr ..
13 (1), p. 1-29, pis. 1. 2.
- - and - - . 19-19, Some Cuban _species of
Globorotalitt. Ibid .. 25 (2), p. 26--15, pis. 58. 1 text-fig.
- - and .1.·\R\'IS, P. ·w., 1929. ?\ew Foraminifera from Trinidad. Ibid., 5 (1). p. 6-17.

pis. 2, 3.
- - and RENZ. H. H .. l!J.J8, Eocene Foramini
fera of the Navet and Hospital Hill formations of Trinidad. B. W. I. Cushman Lab.
Foram. Res .. Spec. Pub/., 2·1. p. 1-42. pis.
1-8.
- - and SIEGFl.ls. S. S .. 1939, Some new andinteresting Foraminifera from the Kreyenhagen shale of California. Cushmau Lab.
Foram. Res., Contr .. 15 (2), p. 23-33, pis.
5-7.
EJ.us. B. F. and 1\-lESSI:->A. A. R., 1940 et seq.,
Catalogue of Foraminifera. Amer. ,1Jus.
Nat. Hist .. Xew York. -15 vols. and supplement vols.
FiNLAY. ll.].. l!J39a, X. Z. Foraminifera: Key
species in stratigraphy No. 2. Roy. Soc.
New Zealand. Trans .. 69(1). p. 89-218, pis.
11-1-1.
- - , 1939b. N. z. Foraminifera: Key species
in stratigraphy No. 3. Ibid., 69 (3). p. 309,
329. pis. 2'1-29.
FHANKLIN. E. S .. 1944, Microfauna from the
Carapita formation of Venezuela. jour.
Paleont., 18 (4). p. 301-319. pis. 44-48, 1
table.
IIA!\IIL.TOK. E. L .. 1953. l:'ppcr Cretaceous,
Tertiary and Recent planktonic Foramini·
fera from !\lid-Pacific flat-topped seamounts. Ibid. 27(2). p. 204-237, pls. 29-32,
text-figs. 1-4b.

Explanation of Plate 34(Figures Sa. b x 75: all others X CiS: a. umbilical view; b, spiral view: c. side view. unlessotherwise noted)
Figs. la-2. Porticulasphaera beckmamzi SAITO. new species. la. umbilical side of holotype, showing intlated and strongly enveloping final chamber (IGPS 79016). lb. side view. lc. spiralview. 2. spiral view of paratype (IGPS 79017).
Figs. 3a-5b. Splzaemidindfopsis senni (BECK~!A:>:l'). 3. hypotype (IGPS 7!J013a). '1, hypotype(IGI'S 79013b). 5. hypotype (IGI'S 79013c).
Figs. 6a-7c. Globigerupsis mexicana (CL'SII:\!A:") 6a, umbilical side of small hyp?type (IGPS
7901-ta). 6b, side \'iew. 7a. side view of small hypotype (IGPS 7901-1). 7b. side dew. 7c,spiral view.
Figs. Sa, b. "Glo/Jigerinoides" lligginsi BoLL.!. 8, hypotype (IGPS 79012).
Figs. 9a-10. G/oboqrndrin~1 !'enezuehma (HEDBERG). 9, hypotype (IGPS 790lla). 10. hypotype
with umbilical tooth at the lower end of the final chamber (IGPS 790llb).

SAITO:

Eocene Planktonic Foraminifera

Plate 34

426.

Eocene Planktonic Foraminifera from Haha-]im:r- - and REX. R. W., 1959. Lower Eocene
phosphatized Globigerina ooze from Sylvania Guyot. U. S. Ceo/ .. Sun·. Prof. Paper,
260-W, p. i-iii. 785-798. pis. 250-25-l, textfig. 255, 1 table.
IIANZAWA. S., 1947, Eocene Foraminifera from
Jlaha-jima (Hillsborough Island). four.
Paleont .. 21 (3), p. 254-259. pis. 39, 40.
- - . 1950, Eocene Foraminifera from 1-Iahajima (Hillsborough Island). (2). Short
Papers. bzst. Ceo/. Paleont .. Tolzoku Unh• ..
(1). p. 1-4, pl. 1.
- - , 1957. Cenozoic Foraminifera of Micronesia. Geol. Soc. llmerica, 11lem., (1i6). 163
p .. pis. 1-41, text-figs. 1-12. tables 1-7.
HEDBERG. H. D.. 1937, Foraminifera of the
middle Tertiary Carapita formation ofnortheastern Venezuela. ]our. Palerml .. 11(8), p. 661-697, pls. Y0-92. text-tig. l. tableI.

HORNIBROOK. N. dt: B .. 1958. New Zealand
upper Cretaceous and Tertiary foramini·feral zones and some overseas correla·tions. Micropaleontology. '1 (1). p. 25-38.
pl. 1. tables 1-:.!.
HowE. H. V .. 1Y39, Louisiana Cook i\lountain
Eocene Foraminifera. Dep. Couserr .. Louisiana Ceo!. Sun• .. Geol. Bull. 1·1. p. 1-122,
pis. 1-14.
MALLORY, V. S .. 1959, Lower Tertiary bio·
stratigraphy of the California Coast
Ranges. viii+416 p., pls. 1-42. 3 text-figs.,
tables 1-19. Amer. Assoc. Petrol. Geol..
Tulsa Okla.
PESSAG:"\0. E. A., Jr., 1961. The micropaleontology and biostratigraphy of the middle
Eocene Jacaguas group. Puerto Rico.
Micropaleontology, 7 (3), p. 351-358, pis. 1,
2, text-figs. 1-3. 1 chart.
REY, M .. 1939, Distribution stratigraphiquedes Ilantkmina dans le Xummulitique duRharb (Maroc). Soc. geol. France, Bull.,
ser. 5, 8 (5-6). p. 321-3-!0. pl. 22, 5 text·
figs., tables 1-3.

225

SAID. R. and KE:"\AWY. A .. 1956. Cpper Creta·
ceous and lower Tertiary Foraminiferafrom northern Sinai, Egypt. J1icropa/eonl·
ology. 2 (2). p. 105-173. pis. 1-1. text-figs.
1-6.
SuoKIII:'\:\, V. A .. 1937. The genus Hantkrni11a
and its stratigraphical distribution in thenorth Caucasus. ;Hoscow Unit•. Lab. Pal.,
Prob. Pal .. (2-3), p. 425-452. pis. 1, 2. text·
figs. 1-65. 1 table.
SoL-RDII.LO:"i. 0 .. 1960, Etude micropaleontologique du Tertiaire du Forage de Frouas(Landes). Rel'lte de .\licropaleont., 3 (2). p.
81-94. pis. 1. 2. text-figs. 1-3.
STAINFORTI!. R .. 1948. Applied micropaleont·ology in coastal Ecuador. ]our. Palemzt.,
22 (2). p. 113-151. pis. 24-26, text-figs. 1,
2.
- - . 1953. Globigeriw1 mexicana CI!AlJS~1A:-;,an Eocene index fossil. Micropaleolllologist.
7 (4). p. 23-25. text-figs. 1-3.
TAKAYA:\AGL Y. and SAITO, T .. Planktonic
Foraminifera from the Nobori formation,
Shikoku. japan. Tolzoku l..Jniz• .. Sci. Rep.,
2nd Ser. (Geol.), (in press].
THAI.MA:\1'. H. E.. 19,12a. Hantkeniua in the
Eocene of East Borneo. Stanford l..hzit•.
Pu/J/ .. l.hziv. Ser., Geol. Sci .. 3 (1), p. 1-24.
text-figs. 1. 2, table 1.
- - , 1942b. Foraminiferal genus Hantkeui11a
and its subgenera. Amer. Jour. Sci .. 240(11), p. 809-820. pl. l, tables 1, 2.
ToDD, R., 1957, Geology of Saipan . .tvlariana
Islands: Smaller Foraminifera. U.S. Geol.
Sun· .. Prof. Paper, 280-H p. i-iii. 265-320,
pis. 64-93. tables 1-t- - and Low. D., 1960. Smaller Foraminiferafrom Eniwetok drill holes. Ibid .. 260-X,
p. i-iv. 799-861, pis. 255-264, text-figs. 256259. tables 1-7.
WF.ISS, L .. 1955. Planktonic index Foraminifera of northwestern Peru. i1Iicropa/eontology, 1 (4). p. 301-319. pis. 1-3. text-fig.
1. tables 1. 2, 1 chart.

226

PROCEEDINGS OF THE PALAEONTOLOGICAL SOCIETY
OF JAPAN

B *ti1:.1~r-'f:~IIB:f1136 if-It¥~:±. 196~ ¥ 1 H
20 f:l:!R ~t ::k:"f:Jll!1f:ffl)J1!!1il~i!I~E¥ii*J!{~;.:.:t,;\, ·'"C
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V:::.~~llfj 9 l±(t.ID )if! I)~~ 7.1 oSome species of Equisetaceae and Podozami·
tacea in Japan and Korea .... Enzo Ko:-o;NoSome Jurassic Trigoniids from the Tctorigroup in the Kuzuryu district, Central
Japan. ((\::~) .............. Shiro 1\lAEDA
Upper Triassic (Carnic) Ammonoids froml\·lalaya. . ................. Tadashi SA TO
A Note on /Jidymoceras awajiense (YABE) ..
.............................. Tatsuro
M,\TSlJ:\·IOTO and
Mitsuo
NAKA="O~~,s~K~~o*7~f~9-~~AEID~It ifiiiQ :6 Jtl.iJnlii?JJ El ~xiHr.i!IIDtA=:*I¥:~ ft:U7111............................ t:ifl4_:.
tiP @~fflfatl~t:J~~f: :1 p '\'- 7 A :.:.H:JJN.' L.;: ..
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On the genus Carpinus with descriptions of
two species ................... Scido E:-;Do
Xeogene Pelagic foraminifera from thesouthern Kanto region ... Yoshiki KIKUCHI
Age, distribution and morphology of Globi·
gerina nepenthes Todd (Planktonic Foraminifera). . . . . . . . . . . Tsunemasa SAITO

llfl.:.--:>~·'"C(f\:15\:) ... -1r!f~f!lj. J'l¥~ t:

Remarks on Some Fossil Dosi11ia of Japan.
. . . . . . . . . . . . . . . . . . . . . . Koichiro ~1Asuo"
Influence of Environment on the Variationof Balil/aria mu/tiformis (LISCHKE) ( '7i=- ~J-IDJ[~:::.:&.Ifi"'J,!;ilJlll)~~) .. ilciR;;fliiX

EJ*lli't ..bm?~·~~.r\:=~mi.:.--:>l·-c ........... .
.................... ' . J!ii~!k . i1:**-=
Mursia takailwshii K. "?\, · -c .......... 4- >)t 1Jil
Dasycladaceae ~.:.--:> \, · '"( .............. iiifilli?kPolyphyletic Derivation of Angiosperms inferred by Leaf-form Evolution ... ~ra,-!13

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XVI ITIII'l<l~llV.r.jt1{:~;(i (International Congress of Zoology) it 1963 iJ'- 7 .;< lJ j} ti~IE '7 "/ :/ r :/1.:.~-c 8 fl 21 8 .1:: I) ~7 8 ;1: -c 7 8 lllli.:.bt.: 'J !Jilll~n o • .:: ID~3i!1) Sponsoring Society tPI.:.I±,00tJ~~?;t(Ml!*~l:t Society of Economic Paleontologists and 1\lineralogists: Society of theStudy of Evolution: The Paleontological Society ~ifn:Ja l?.h:O o~:;Ni.:.lm-t o llH1~-tt7t ~ r:t."ftlcd)jffi 'J -c·;t; :o.
Dr. Gairdner B. Mo~lE:"T
Secretary General. X VI International Congress of Zoology.
~101 Constitution Avenue, \\iashington ~5. D. C., U.S. A.

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