ISSN 0031-0204

Transactions and Proceedingsof thePalaeontological Society of Japan
New SeriesNo. 117

Palaeontological Society of Japan
April 30, 1980

Co-Editors
Associate editor

Itaru HAYAMI and Tsunemasa SAITO
Tomowo OZAWA

Officers for 1979-1980

President: Tetsuro HANAI
Councillors: Kazuo ASAMA, Kiyotaka CHINZEI, Takashi HAMADA, Tetsuro HANAI,
Itaru HAYAMI, Hisayoshi IGO, Kametoshi KANMERA, Tamio KOTAKA, TatsuroMATSUMOTO, Ikuwo OBATA, Tsunemasa SAITO, Tsugio SHUTO, Yokichi
TAKAYANAGI, Toshimasa TANAI, Ryuzo TORIYAMA
Members of Standing Committee:

Kazuo ASAMA (Finance), Kiyotaka CHINlEI(General Affairs), Takashi HAMADA (Planning), Itaru HAY AMI (Transactions),
Hisayoshi IGO (Foreign Affairs), Ikuwo OBATA (Membership), Tsunemasa
SAITO (Transactions), Tsugio SHUTO (Special Papers), Yokichi TAKA YANAGI("F ossils")
Secretaries: Hiromichi HIRANO and Yasumitsu KANIE (Membership), Kunihiro ISHIZAKI ("Fossils"), Tomowo OZAWA (Transactions), Toshiyuki YAMAGUCHI(General Affairs), Juichi YANAGIDA and Ienori FUJIYAMA (Special Papers)
Auditor: Sumio SAKAGAMI

The fossil on the cover is Nipponitella expZicata HANZAWA, an aberrant
uncoiled fusulinacean from the Lower Permian Sakamotozawa Formation,southern Kitakami, Northeast Japan.

All communications relating to this Journal should be addressed to the
PALAEONTOLOGICAL SOCIETY OF JAPAN,
c/o Business Center for Academic Societies,
Yayoi 2-4-16, Bunkyo-ku, Tokyo 113, Japan.
Sole agent: University of Tokyo Press, Hongo 7-3-1, Tokyo, Japan.

Trans. Proc. Palaeont. Soc. Japan, N. S., No. 117, pp. 237-241, pI. 29, April 30, 1980

711.

REVISION OF THE PERMIAN "STROMATOPOROIDS"REPORTED FROM JAPAN*
KEI MORI

Institute of Geology and Paleontology, Tohoku University, Sendai 980

Abstract. Four species of Permian "stromatoporoids" described from Japan
have been reexamined based on the original specimens and their thin sections.
None shows clear skeletal structures of genuine stromatoporoids owing to theirpoor state of preservation or to misidentification. It is concluded that one is pos·sibly a chaetetid, two may be sponges and the fourth likely to be a brachiopod.
There is no positive evidence for the occurrence of Paleozoic· type stromatoporoids
in the Permian either in Japan or elsewhere. These facts suggest that they became
extinct prior to the Permian.

type stromatoporoids has remained uncertain. Among these, Permian forms
have been especially questioned (seeFLUGEL and FLUGEL-KAHLER 1968). The
following five Permian species have been
described as Paleozoic-type stromatoporoids:

Introduction
Two distinct groups of stromatoporoids
are known in the geologic record: thePaleozoic-type, and the Mesozoic-type,the latter having also been calledsphaeractinoids.
The former occurs
commonly in Ordovician, Silurian and
Devonian carbonate rocks. They havea world-wide distribution, being important as reef builders, especially inthe latter two periods. It is known thatstromatoporoids appeared in the Middle
Ordovician, reached their acme in the
Middle Devonian and then most of them
became extinct at the end of the Devonian. Some rare forms have been reported in the Carboniferous and Permian
Periods. However, there has been controversy as to whether species describedfrom the Upper Carboniferous and Permian are genuine stromatoporoids, andreal stratigraphic range of the Paleozoic-

Megastroma lecomptei MONTANAROGALLITELLIClathrodictyon somaense Y ABEand SUGIYAMA
Lophiostroma ozawai Y ABEand SUGIYAMA
Amphipora dr. asiatica REED
Stromatopora (Parallelopora) minoensis
YABE and SUGIYAMA

Except for Megastroma lecomptei from
Italy, all are from the Japanese Permian.
The genera to which these species havebeen allocated are well known among
Silurian and Devonian stromatoporoids.
Type specimens of the Japanese species
are stored in the Institute of Geology* Received August 7, 1979; read June 3,
1978 at the l21st Meeting of the Society at
Tsukuba.

237

238

Kei MORland Paleontology, Tohoku University,
Sendai. The purpose of the present
paper is to revise these four species
using the original specimens and theirthin sections, and to clarify the stratigraphic occurrence of Paleozoic-type
stromatoporoids.

Acknowledgements
The author wishes to thank Professor
jack A. GRANT-MACKIE, Department of
Geology, Auckland University, for reading the manuscript. He is indebted toProfessor juichi YANAGIDA, Departmentof Geology, Kyushu University and Dr.
jun-ichi TAZAWA, Institute of Geology
and Paleontology, Tohoku University for
their comments. Thanks are also due
to Mr. Kimiji KUMAGAI for his photographic work, Mr. Akio ISHIKAWA andMr. Masaaki SHISHIDO for making thinsections.

Revision of the species
1. "Clathrodictyon somaense
Y ABE and SUGIYAMA"
PI. 29, Fig. 1
Clathrodictyon somaense sp. nov., YABE andSUGIYAMA, 1933, p. 22, text·fig. 3.

This species was proposed by Y ABEand SUGIYAMA (1933) from the Permianof Abukuma Mountains, japan. The
fossil locality is 2.5 km west of Zusahara, Kamimano-mura, Soma-gun, Iwaki
province (i. e. 2.5 km west of jisabara,
Kashima-cho, Soma-gun, Fukushima Prefecture). Y ABE and SUGIYAMA reported
that the specimen was obtained from alarge limestone boulder, probably derived
from the upper part of the Permian Oashi Formation. The original description

was based on a very small fragmental
specimen, completely embedded in thelimestone. Examination of the thin section of the holotype (monotypic, IGPS
colI. cat. no. 34479) indicates:
a. Two small fragments appear in thesame thin section. They are separated
from each other, and were considered by
Y ABE and SUGIYAMA as vertical andtangential structures of the same stromatoporoid. However, there is no evidence that the two specimens originate
from a single skeleton.
b. In the figure shown in the text-fig.
3-B by Y ABE and SUGIYAMA (op. cit., p.
22) many dark dots which look like cut
ends of vertical pillars of stromatoporoids are recognized. However, thepicture was retouched. The original
specimen is in a very poor state of preservation and no pillar-like structures
are preserved. Thus it is difficult torefer the specimen to a stromatoporoid.
c. The figure of the text-fig. 3-A (op.
cit., p. 22) was also retouched. The structures described as laminae by Y ABE andSUGIY AMA are not like genuine laminae
as found in the genus Clathrodictyon. It
is probable that vertical structures of achaetetid have been misinterpreted aslaminae of stromatoporoids.
Unfortunately there is no similarity
between "Clathrodictyon somaense" andC. vesiculosum NICHOLSON and MURIE as
claimed by Y ABE and SUGIYAMA. In
conclusion, C. somaense is not considered
to be a valid stromatoporoid species.
2. "Lophiostroma ozawai Y ABEand SUGIYAMA"
PI. 29, Figs. 2, 3
Lophiostroma ozawai sp. nov., YABE and Suo
GIYAMA, 1931, p. 18, pI. 3, figs. 1-4.

711.

Revision of Permian "stromatoporoids"

This species was proposed by YABEand SUGIYAMA (1931) from the Permianof Omine-mura, Mine-gun, Nagato province (i. e. Akiyoshi Limestone Group?
at Mine-shi, Yamaguchi Prefecture).
As in the case of "Clathrodictyonsomaense", the description of the species
was based on a very small fragmental
specimen. Examination of thin sections of the holotype (monotypic, IGPS
colI. cat. no. 38751) and the figures published by YABE and SUGIYAMA (1931,
pI. 3, figs. 1-4) indicate that the specimen
does not belong to a stromatoporoid but
to a brachiopod (see also FLVGEL and
FLUGEL-KAHLER, 1968, p. 299). The structure interpreted as vertical columns ofLophiostroma by Y ABE and SUGIYAMA
are well assigned to taleolae, and laminated "horizontal" structures are of shelllayer of the brachiopod. The dark dotsof the tangential section (pI. 1, fig. 3)
can be easily distinguished from the cut
ends of papillae of Lophiostroma by theabsence of concentric structures. They
are considered to be pseudopunctae ofthe brachiopod.
Although YABE andSUGIY AMA claimed close resemblance
between "Lophiostroma ozawai" and L.
schmidti (NICHOLSON), a well known
Silurian species, their internal structures
are entirely different. It is highly probable that the specimen belongs to a
strophomenid brachiopod.

239

cat. no. 43480) came from the same
limestone boulder as the one in which"Clathrodictyon s011laense" occurred. As
in the case of "C. somaense", Y ABE andSUGIY AMA described the skeletal structures of the species, observed only in asingle thin section. Examination of thethin section indicates:
a. The figures shown by Y ABE andSUGIY AMA were retouched and modified_
The thin section suggests that the skeletal parts are much denser than thoseof A. asiatica, although the specimen isin a poor state of preservation.
b. It is not clear whether the "verticalsection" of YABE and SUGIYAMA showsa real vertical skeletal structure, because
the width of the skeleton (Fig. 4) ismuch less than the diameter shown in
Fig. 5, and an axial canal is not represented.
c. There is no positive evidence thatthe specimen has a ramose, dendritic or
cylindrical shape. The tangential section (Fig. 5) seems to be a part of afragment, and not to have been circularin original shape.
As mentioned above, the state of preservation is not good enough to refer
the specimen to a genuine stromatoporoid. It may be assigned to a sponge
as noted by FLVGEL and FLVGEL-KAHLER(1968, p. 33).
4. "Stromatopora (Parallelopora) mi-

3. "Amphipora dr. asiatica REED"
PI. 29, Figs. 4, 5

noensis YABE and SUGIYAMA"
PI. 29, Figs. 6, 7

Amphipora dr. asiatica Co\VPER REED: YABEand SUGIY A;'vIA, 1933, p. 21, text-figs. 1,2.

Stromatopora (Parallelopora) minoensis sp_
nov., YABE and SL"GIYA1'vIA, 1930, p.20,
pI. 7, figs. 1-5.

Amphipora asiatica was originally described by Reed from the Upper Carboniferous of Yunnan, China. The specimen
described as A_ dr. asiatica (lGPS colI.

The present species was reported fromthe Lower Permian limestone at Kinshozan, Akasaka, Gifu Prefecture, Japan.
Thin sections were newly made from

Kei MORl240

the holotype specimen (mono typic, IGPS
colI. cat. no. 37948), because the original
thin sections were lost. Gross skeletal
structures of the present specimen show
no similarity to those of Stromatopora or
Parallelopora.
Discontinuous verticalstructures and the absence of horizontal
structures as shown in Figs. 6, 7 are notcharacteristics of these genera. Y ABEand SUGIYAMA discussed the microstructure of the present specimen and compared it with that of Parallelopora
ostiolata BARGA TZKY and P. goldfussi
BARGATZKY, both from the Devonian ofEifel. But the microstructure of theJapanese specimen is obliterated. It may
be referred to a sponge, although thepresence of pseudomorphs of spicules
noted by FLVGEL and FLVGEL-KAHLER(1968, p. 268) was not confirmed in the
newly made thin sections.
Discussion and conclusion

The present reexamination of the typespecimens indicates that there is no clear
evidence for the presence of genuine
Paleozoic-type stromatoporoids in theJapanese Permian. Furthermore, theaffinity of Megastroma lecomptei withthe stromatoporoids is open to question.
JUdging from the figures published by
MONTANARO GALLITELLI (1954, pI. 8, figs.
2-5; pI. 9, figs. 1, 1a and pI. 10) its skeletal

structures are different from those oftrue stromatoporoids. MONTANARO GALLITELLI mentioned similarity between
Megastroma and Stachyodes, but the
microstructures shown in her pI. 10, figs.
3-5 are considered not comparable withthose of stromatoporoids. It is here
concluded that Paleozoic-type stromatoporoids were extinct prior to the Permian. This is also supported by the factthat except for the five taxa discussed
above, no other Paleozoic-type stromatoporoids have so far been reported from
Permian sediments of the world.
Besides the Paleozoic-type stromatoporoids, such genera as Disjectopora,
Carterina and Irregulatopora have been
described as stromatoporoids from thePermian of the Salt Range, Pakistan by
W AAGEN and WENTZEL (1887). LECOMPTE(1956) placed those genera in the Family
Disjectoporidae, Order Stromatoporoidea.
However, gross structures of these genera
can distinguish them from Paleozoic-type
stromatoporoids. Related forms havebeen reported also from the Permian ofsome other districts (see FLVGEL, 1975).
Further work should be done to confirm
as to whether these Permian forms canbe considered ancestors of the Mesozoic
sphaeractinoids, because their microstructure is poorly known and their geographic distribution is very limited.
They may, however, hold the key to

Explanation of Plate 29
Magnification x 10
Fig. 1. "Clathrodictyon somaense YABE and SUGIYAMA"IGPS coil. cat. no. 34479. It is here regarded as a nomen dubium (probably a Chaetetid).
Figs. 2, 3. "Lophiostroma ozawai YABE and SUGIYAMA"IGPS coil. cat. no. 38751. It is here regarded as a nomen dubium (probably a strophomenid
brachiopod) .
Figs. 4, 5. "Amphipora efr. asiatica REED"IGPS colI. cat. no. 43480. It is here regarded as a nomen dubium (probably a sponge).
Figs. 6, 7. "Stromatopora (Parallelopora) minoensis YABE and SUGIYAMA"IGPS colI. cat. no. 37948. It is here regarded as a nomen dubium (probably a sponge).

J\lIo RI:

Permian "stromatopo1"oids"

Plate 29

711.

Revision of Permian "stromatoporoids"

trace the phylogenetic relationship between Paleozoic-type and Mesozoic-type
stromatoporoids (or the sphaeractinoidgroup).
References
FLljGEL, E. (1975): Fossile Hydrozoen·Ken
ntnisstand und Probleme. Paliiont. Zeit.,
Bd. 49, p. 369-406.
FLOGEL, E. and FLOGEL·KAHLER, E. (1968):
Stromatoporoidea (Hydrozoa palaeozoiea),
Fossilium Catalogus 1: Animalia, pars115-116. Dr. W. Junk N. V., Den Haag.
LECOMPTE, M. (1956): Stromatoporoidea, inTreatise on Invertebrate Paleontology,
Part F, Coelenterata. Ceol. Soc. Amer.,

Akasaka ~JR,Akiyoshi V\ic7",

241

F. 107-144.
MONTANARO GALLITELLI, E. (1954): Il Permiano del Sosio e i suoi Coralli. Palaeo/!logr. Italica, vol. 49, p. 1-98.
WAAGEN, W. and WEl\TZEL, J. (1887): SaltRange fossils, vol. 1. Productus Limestone
fossils, Coelenterata. Palaeont. Indica,ser. 13, vol. 1, p. 835-994.
YAIlE, H. and SUGIYA:VIA, T. (1930): Noteon a Lower Permian stromatoporoid fromJapan. Jap. Jour. Ceol. Ceogr., "01. 8, p.
19-22.
- - and - - (1931): Note on a new formof Lophiostroma from the Permian ofJapan. Ibid., vol. 9, p. 17-19.
- - and - - (1933): Discovery of Amphipora and Clathrodictyon in the Permianof Japan. Ibid., vol. 11, p. 19-23.

Jisabara roW:,

Kashima-eho 1lE&'1jlIlJ,

Mine ~:(fJ',Oashi 'K?

*:ffIi£:=£ac "~:rLrtl." O)~'*fft: ~:rL;EJWHt ~~i~~c '1"~{~1Nc 1;:' :kJ]Ij~:h00 itfr~·
itT Iv r ~ ;,,*ccpJtljl;:.tBm L, '/ IVlv*,C • T;f- /*,c1;:.!ilili(¥'~~ c V(~* Lt.:I.J;, .:to).itI!5:B9
5t;{JH;:''':)\, '-C, t#1;:'5J\.:{JJ0)l:~JH;:.r.~iI:!!l.J;0);: ~h -C ~t.:o fit*tJl::l'F-O)=j':.':*l.Jd?, ~~{~m1~:rLrtl. c L -C 5 ~ 5 :fjUIH!i~h -C\,' 01.J;, .:to)CP 4 ~ Hi1lI.J;*:ffI~-Ci/6 0 0 4-1il].:tO)~A~*"i'N~~ U.:t;5*, f*:fFf PUZ. It !<ll:xE O):l\'pn::. J: I), \"fh t ~O)Jil1!i:rLrtl. c It.7;..tJ: LX. tJ:\";: c
1.J;~GI.J,ctJ:-:,t.:o 7~1)0)1!J ~ -~O){,O)t MONTANARO GALLITELLI (1954) l.J;f!rrt!iliLt.:J: IjtJ: Stachyodes cO)!JWl{);J,¥llt.7;..GhtJ:\"o - j j WAAGEN and WEl\TZEL (1887) I.J;
Salt Range o)=~*I.J'G~:rLrtl.c L-C¥lH!iLt.: Disjectopora {tQO)flv-7'IH'bv}l0~~(~m1c Itii'i'dJ: 01l-:ftHllfiii"i' t -? -C \" 0 0 ;: hl.J;cp~Km1 OUt sphaeraetinoids) c c-Ij \" Ij
1*lf,H;:.i/6 01.J'lt4-f&0)r.~iI:!!-C·i/600 tJl:O)T -!J tJ7'H::., =~*I.J' G~O)~1=.i~m1c .7;..tJ: L Ij
o ~:rLrtl.O)¥~-i5{JIJI.J; tJ:H1H i/6b-1±"~ X. 0 c, i11=.{~m1J~mrtl.ltj?tJ: < c >b ={'HctJitfrl::.M!liWZ
Lt.: (, 0) c m:xE ~ h 0:ri- li->!f0Trans. Proc. Palaeont. Soc. japan, N. S., No. 117, p. 242, April 30, 1980

SHORT NOTES

17. EPONIDES SHIRAII, NEW NAME FOR EPONIDES ASANOISHIRAI, 1960 (PREOCCUPIED)SABURO YOSHIDA
Department of Earth Sciences, Faculty of Education, Yamagata
University, Yamagata, japan

Eponides asanoi SHIRAI.

During the course of a study of foraminifera from the northeastern part ofJapan, it was discovered that Eponides
asanoi SHIRAI (1960, p.540, pI. 2, fig. lac) from the Pliocene Setana Formationof Hokkaido, Japan is preoccupied by
Eponides asanoi YOSHIDA (1958, p. 257,
pI. 2, fig. 4a -c) from the Paleocene Kiritappu Formation of Hokkaido.
Since no action has been taken by Dr.
T. SHIRAI who was informed about thehomonymy of his species, a new nameis herein proposed in order to promotestability of nomenclature. The newname Eponides shiraii is proposed for

References
SHIRAI, Takehiro (1960): New genus andspecies of foraminifera from the Pliocene
formation, southwestern Hokkaido. Hokkaido Univ., Fac. Sci., jour., Sapporo,japan, ser. 4 (Geol. Min.), vol. 10, no.
3, p. 537-543, pls. 1, 2.
YOSHIDA, Saburo (1958): The foraminiferal
fauna of the Upper Cretaceous Hamanaka
and Kiritappu formations of eastern Hokkaido, japan. Hokkaido Gakugei Univ.,
jour., Sapporo, japan, vol. 9, no. 1. p.
250-277, pls. 1-4.

Received Oct. 26, 1979.

242

Trans. Proc. Palaeont. Soc. Japan, N. S., No. 117, pp. 243-246, April 30, 1980

712.

RELATIVE FALL OF SEA LEVEL WITHIN THE PAST 3000 YEARSKENJI KONISHI and SHINY A MATSUDA
Department of Earth Sciences, Faculty of Science, Kanazawa University,
Marunouchi, Kanazawa 920

Abstract. Radiocarbon dating of two crustose coralline algae (Porolithon onkodes) and six hermatypic corals (species of Porites, Acropora and Goniastrea)
from a windward fringing reef complex off Kabira Bay, Ishigaki-jima (Southwest
Ryukyus) reveals that the present-day reef crest exposing 60 cm above the meanlevel of low tide does not represent a growing algal ridge system, but relics of asalient ridge grown between 1500 and 3000 years ago, when sea level stood at least
1.5 m higher than the present. A later fall of the sea level has planed off the topof the ridge down to the present configuration where the erosion predominates overupward "sedimentation".

The classic concept of Postglacialhydro and glacio-isostatic readjustment oflithosphere (DALY, 1934) has been vitali
zed to reconcile discrepancies among the
curves of relative sea level change during the Holocene, which have been documented from various areas in the world(e. g. WALCOTT, 1972). In order to refine
a numerically predicted curve modeled
after this concept (CLARK et ai., 1978),
however, we are still short of fieldstudies controlled through time both inlocal and regional extent.
Surficialgeology of contemporary coral reef canprovide information pertinent to thispurpose, especially when supported byradiocarbon dating (e. g. TRACEY and
LADD, 1974; BUDDE MEIER et ai., 1975).
In the fringing and barrier reefs of
the Ryukyu Islands, the windward reef
crest exposing above the mean low waterlevel is ubiquitously characterized by thelack of algal ridge system and is actuallybarren of the present-day reef-building
organisms including crustose coralline
algae. As a typical example of thissituation, we selected the windward
fringing reef complex (24°27'N ; 124 '09'E)
off Kabira Bay, northwestern Ishigakijima, Southwest Ryukyus, where a topographic zonation from forereef slope tocoastal beach, via low tide bench, reef
crest and moat, has been recognized(Fig. 1). Severe neotectonic uplift related
to the plate convergence has not been
deduced here from our studies of raisedcoral reefs (KONISHI et ai., 1974).
Our dated materials came from thefollowing four environments (Table 1;
Fig. 1).
(1) Reef crest exposing 60cm above low
tide level consists of coral-algal reef rockcomposed of dead colonies of huge thickstalked tabular Acropora (A. cfr. humilis)
and crust (one 5 cm and the other morethan 20 cm in thickness) of Porolithon
onkodes with subordinate massive Coniastrea, while the fore reef slope and low

Received August 30, 1979.

243

244

KenJ"i KONISHI and Shinya MATSUDA
Table 1. Radiocarbon dates of corals and coralline algae from windward
fringing reef, off Kabira Bay, north-northwestern Ishigaki
SampleNo.

Corals:N-3248 (KM-02)
N-3247 (KM-Ol)
N -3249 (KM -03)
Gak-5859 (KK74111904)
Gak-5960 (KK74112102)
Gak-5858 (KK74111506)
Coralline Algae:
N-3251 (KM-05)
N-3250 (KM-04)

HC age(T 1/ 2 ; 5568y.)

Elevation above
mean sea level

Taxa

m

o (reef crest)

Acropora sp. cfr. humilis
Acropora sp. cfr. humilis
Goniastrea sp.
Porites sp.
Goniastrea sp.
Porites sp.

- 0.1 (reef crest)- 0.2 (reef crest)
1. 5 (abandon ned bench)
1. 0 (emerged beachrock)o (dead microatoll)

2980+802350±80
1980±753030±95
1440±901060±90

Porolithon onkodes
Porolithon onkodes-0.2 (reef crest)-0.2 (reef crest)

2270±75
1600±85

o

500m
I

,

A corallinealgae

o coralLOW TIDE
BENCH

MOAT

REEF CREST

BEACH

ISLET

1440

3030

~.

No or Negative Sedimentation

if~'--,-:"_~---~,)~~ --~, -~;;>~~_~:@-:~~~Ii.~
MLW - -"•

i

/2350\ 2980 1980

2270

1600

j

'f-.......
,/

Positive Sedimentation.. -'>
'>

~

~

.->.

:::

..

" _ '-..""............:c.':.(1060"'(iJ7;t;; " .. :.p /§ic ",.1!",}' ~:C~~ A~~~'~"'
ORAL
KNOLL

-_ .... -_ ... ,,,Fig. 1. Map and schematized cross-section across windward fringing reef off
Kabira Bay, north-northwestern Ishigaki. Localities and radiocarbon ages of dated
fossils are indicated.

712.

Relative fall of sea leveltide bench are the site of vigorous growthof tabular species of Acropora. A veneerof living crustose corallines starts tooccur only from the upper fore reef slope
below the low tide bench. Radiocarbon
ages were determined for three corals
and two algae from the reef crest, whichwere recovered in a shallow excavation(20 cm in depth).
(2) Back-reef moat, 2 to 3 m deep,
holds microatolls of Porites both living
and dead. The outermost layer of adead microatoll about 1.0 m in diameterhas been collected for radiocarbon datingfrom a very shallow landward part ofthe moat off Yoshihara. In contrast to
the living colonies, it exposes above themean low water.
(3) At the northeastern beach of Kojima, emergent beachrocks crop out 1.0 m
above the present mean high water level.
A small authochthonous colony of Porites
attached to the top of the beachrock wascollected for dating.
(4) A thick, but partly eroded, colonyof Goniastrea was sampled from a driedtide pool on an abandon ned abrasion
bench cutting the Pleistocene Riukiu
Limestone, 1.5 m above the present meansea level.
Our radiocarbon dates indicate thatthe sea level here (1) attained the present position by 4000 y. B. P. or even
earlier, (2) stood at least 1.5 m higher
than the present during the period
between 1500 and 3000 y. B. P., and (3)subsequently fell to the present, resulting in diminishing a ridge covered withalgal crust into the non-accreting reef
crest, within the past 1000 years. Abandonned bench of several tens cm above
the highest high water spring which
occurs sporadically at pocket beach may
record the same event of the sea level
drop. A similar magnitude of relative fall of sea level for the last 2000

245

years was lately documented at the
Senkaku Islands about 150 km northwestof Ishigaki across Okinawa (=Ryukyu)
Trough (KONISHI et at., 1979).
A study of growth rate and successionof crustose coralline algae on artificial
substrate (glass and polyvinyl chloride
plates) confirmed that practically not asingle thallus of the coralline algae has
settled on the top of the reef crest during one year experiment (MATSUDA, 1979).
Together with this conclusion, field observation about activities of reef-building organisms suggest that the reef crest
represents an unstable substrate, where
erosion accompanied with urchin boring(Echinometra mathaen (BLAIKVILLE)) prevails to accretional sedimentation atpresent. Like other parts of the Ryukyu
Islands, the sea level maximum referredto the "Climatic Optimum" of 5000 to
6000 y. B. P. could not be verified here.
Much deeper structure of this windward
fringing reef off Kabira should be thoroughly examined, with the aid of subsurface coring, in order to trace backthe history of sea level changes prior to3000 y. B. P.
The present work is an outgrowth of
the interdisciplinary research project financed by the Grant-in-Aid for Scientific
Research (No. 910313) from the Ministryof Education, Science and Culture. We
thank Prof. M. HORIKOSHI, the project
representative. Radiocarbon dates were
supplied from Dr. K. KIGOSHI (Gakushuin
University) and Mr. T. HAMADA (Japan
Radioisotope Association).

References cited
BUDDnIEIER, R. W., S~IlTH, S. V.

and KI:\ZIE,
R. A. (1975): Holocene windward reef-flat
history, Enewetak atoll. Ceol. Soc. Amer.
Bull., vol. 86, p. 1581-84.
CLARK, J.,
FARRELL, W. E.
and PELTIER,

Kenji KONISHI and Shinya MATSUDA

246

w. R. (1978): Global changes in Postglacial sea level: a numerical calculation.
Quat. Res., vol. 9, p. 265-87.
DALY, R. A. (1934): The changing world of
Ice Age. p. 1-277. Yale Univ. Press.
KO:\'ISHl, K., OMURA, A. and NAKAMICHI, O.
(1974): Radiometric coral ages and sea
level records from the Late Quaternary
reef complexes of the Ryukyu Islands.
Proc. 2nd Intern'l Coral Reef Symp., no.
2, p. 595-613.
KONISHI, K., OSHIRO, I. and TANAKA, T.
(1979): Holocene raised coral reef on
Senkaku Islands: an active remnant arc.
Proc. Japan Acad., vol. 55, ser. B, no. 7,
p. 335-340.

MATSUDA, S. (1979MS): Succession, growth
rates and sedimentation of encrusting
crustose coralline algae in upper forereef
environment on Ishigaki Island, Ryukyu
Islands. (in Japanese with English abstract). M. Sc. Thesis, 1979-No. 52, Fac.
Sci., Kanazawa Univ. p. 1-113.
TRACEY, J. I. Jr. and LADD, H. S., (1974) : Quaternary history of Eniwetok and Bikini
atolls, Marshall Islands.
Proc. 2nd
Intern'l Coral Reef Symp., no. 2, p. 537550.
WALCOTT, R. I. (1972): Past sea levels, eustasy and deformation of the Earth. Quat.
Res., vol. 2, p. 1-15.

3&J*3000if-F,<9 (J) ~[lM(j9i'fij)K$~ r :JT,tJ>j(7UJi!;EmJll;(J)Jllf~7H.:.a;7.>}!I.l:fJ!H!H\\H':'Lt.f~f~i~AfjLJ: I) t ~ 60cm i'iJJ<~rctl\-lj-:/::t, -lj-:/:"-'C(J)1:.wL--n'tJ::~'f:l:1l.i@m (reef crest) iJ;d,t.~.n7.>o ':(J)f!ii@ti~f*iJ,~j3lU&~.nk.-lj-:/::t -'C(Porolithon onkodes) 2 ~*'l-, ~i@it-lj-:/~' 6 ~*,t (Acropora, Goniastrea,.: (J)f:l:1l.i@miJ: E!J(~li\it* .."C'ttJ:: < 1500~3000 if-iitr(J)Ii\l\~t ~tJ:: < C t 1. 5 m w7lc$iJ: ~iJ' -:,f-:': C z-~ L--C
-t(J)1&(J);f§M(t9w7lc~~r1':' J: I) -t(J)~l±lmBt fHtz- ? ftmtE(J):llB7f%::-"i "(-f:l:il.{l:~.n'N§fm= • tllIl {$ill

Porites~) (J)1itMEiai~if-~'t,

I±lfm(J)~ff:lt!?3fJ"(-a; I), ~lli'jftmtE J: I)~,7.> 0t-:oTrans. Proc. Palaeont. Soc. Japan, N. S., No. 117, pp. 247-253, April 30, 1980

713.

URANIUM-SERIES AGE OF THE HIRADOKO AND UJI SHELL
BEDS, NOTO PENINSULA, CENTRAL J AP AN*
AKIO OMURA
Department of Earth Sciences, Faculty of Science,
Kanazawa University, Kanazawa, 920

Abstract. Th 230 /U2,.. dating of ahermatypic coral shows that both the Hiradoko
and Uji Shell Beds of the Noto Peninsula were formed at the same age, approximately 120,000 years ago. Some discriminations in faunal composition between
these two shell beds are likely to have been caused by the difference in bathymetric control due to the submarine topography. The marine Hiradoko Terrace including these shell beds is correlative with the Shimosueyoshi Terrace in thesouthern Kanto area, which is traceable with the shoreline features in many partsof the world, formed during a late Pleistocene eustatic high sea stand. The elevation of the former shoreline for marine terraces around the Noto Peninsula, which
are correlated with the Hiradoko Terrace, indicates an average rate of uplift varying from 1.2 m per 1,000 years in the northern end of the peninsula to 0.4 m per
1,000 years in the south during the last 120,000 years.

and structural studies of these terrace
deposits, their chronologie assignment
have remained uncertain, because either
radiometric dates or such a time-indicative marker as tephra were not available.
The Hiradoko Shell Bed named by
MOCHIZUKI (1932) who also described amolluscan fauna near Hiradoko, wasformerly thought to be either a late
Pleistocene or nearly Holocene age (e. g.
ASANO, 1938). The Hokuriku Quaternary
Research Group (abbreviated HQRG,
hereafter; 1961) found another shell bed
called the U ji Shell Bed, at a locality
only 4 km east of the outcrop of the
Hiradoko Shell Bed. From morphostratigraphic and paleontologic reasons,
HQRG (1961) has suggested a probablecorrelation of the Hiradoko Shell Bed
with the Shimosueyoshi Terrace depositin the southern Kanto area. The Hiradoko Shell Bed was then stratigraphically

Introduction

Th23°/U234 ages averaging 120,000±
6,000 years old have been determined
for solitary corals from the Hiradoko
and U ji Shell Beds in the northern partof Suzu City, Ishikawa Prefecture. These
are the first uranium-series dates available from marine terraces of Honshu,
Japan, which now allow us to relatethese beds to various Pleistocene eventsin other areas. Preliminary results ofoxygen isotope ratio (0 18 /0 16 ) analysis
are also presented for some molluscan
shells from these shell beds.
Late Pleistocene marine terraces arealmost continuously distributed aroundthe Noto Peninsula except the rocky
coast in the northern part. In spite ofextensive paleontologic, geomorphologic* Received September 7, 1979; read June 9,1979 at Tatsunokuchi, Ishikawa Prefecture.

247

Akio OMURA

248

divided into two members, Upper andLower. The Uji Shell Bed was separated
from these members as having been deposited during a later transgression corresponding to another eustatic high standof sea level ("Musashino transgression"in South Kanto) which occurred subsequent to the Shimosueyoshi transgression. U JIIE (1975) once argued a possibility that the Hiradoko Shell Bed is of
Postglacial age based on its foraminiferal assemblage. However, these paleontologic and morphostratigraphic datings
are less reliable than radiometric dates
to identify and correlate subdivisions of
the late Pleistocene, because faunalchanges have been negligible during
this short period of time and because of
local variations in the rate of verticaldisplacement. The Hiradoko and Uji
Shell Beds have been dated by the (14method as being > 30,000 and 21,200±
1,200 years B. P., respectively (FuJII, 1969).
Such recent works as KASENO and HIRAYAMA (1976), FUJII (1976), MATSUURA(1977) and OTA and HIRAKAWA (1979)
reviewed these previous views of age
assignment and suggested that both ofthese shell beds may be formed during
the same transgression phase.
Materials and Locations
Analyses were made on five samples
consisting of two species of ahermatypic
solitary corals, Cylindrophyllia minima
Y ABE et EGUCI-ll and Heterocyathus japonicus (VERRILL), from localities 18 and
24 of MORI (1976, ms) as shown in Fig. 1.
The following locality descriptions referto a 1 to 25,000 scale sheet (1970 edition)"Noto-lida" of the Geographical Surveyof Japan.
Loc. 18
Hiradoko

Terrace of

HQRG (1961).

Fig. 1. Index map showing the locali.
ties where the analyzed coralJine samples
were colJected. Locality number refers to
those of MORI (1976, ms).

Longitude 137" 18'16"E, latitude 37'27'04"
N, 30 m above the present sea level, ata quarry about 750 m south of Hiradoko,
Suzu City.
Loc. 24
Uji Terrace of HQRG (1961). Longitude 137"20'51"E, latitude 37"27'51"N, 13
to 15 m above the present sea level, at
an outcrop about 100 m west of the
Honryuji Temple, Uji, Suzu City.
Methods and Results
The Th 23 °/U234 method of dating marine
carbonate materials has been discussed
by many workers (e. g. BROECKER, 1963;
THURBER et at., 1965; SAKANOUE et at.,1967). The procedure for separating andpurifying thorium and uranium isotopes
is essentially the same as that was described by OMURA (1976). The overallchemical yield was checked by U232 and713.

Age of Hiradoko and Uji Beds

249

Table 1. Isotopic composition and estimated ages calculated from Th230/U234 ratios ofsolitary corals from Hiradoko and Uji Formations.
Stratigraphic I Material
Unit*

Hiradoko
Formation

C.m.**Uji

Isotope Concentration

Activity Ratio

Estimated
Th 230 Age
U238
230
23O
U234 I Th 232 Th 230 U234/
U238 Th
Th232/ I ThU234/ (x 10 3yr)(ppm) (dpm/g) (ppm) (dpm/g)
4.07
±0.12

3.30
±0.10

--

---- - - - - - -

0.151
2.16
±0.021 ±0.07

1. 09
±0.02

59.6
±8.0

3.83
±O.O8

3.06
±0.O6

0.116 2.04
±0.022 ±0.07

1. 07
±0.02

72.9
±13.6

0.667
119+ 9- 8±0.026

4.02
±0.11

3.26
±0.09

0.136
2.23
±O.020 ±0.07

1. 09
±0.02

68.3
±9.7

0.684
125+ 9- 8±0.025

3.83
±0.1O

3.18
±0.08

2.13
0.105
±0.016 ±0.05

1.11
±0.02

84.3
±12.6

0.670
120+ 9- 8±0.025

2.76

0.141

1.13
±0.03

54.5
±8.3

0.670
120+ 9- 8±0.025

1

115+ 100±0.029
. 655
- 8

---

,---'

Formation

H. j.***

3.27

1. 85

I ±0.081 ±0.07 ±0.021 ±0.05* according to the Hokuriku Quaternary Research Group (1961)** Cylindrophyllia minima YABE et EGUCHI*** Heterocyathus japonicus (VERRILL)
Th 228 used as the yield tracers. Alphaparticle spectrometry was employed, using a multi-channel pulse height analyzer
with silicon solid-state detectors.
Analyses of X-ray diffraction patterns
prove that all the coral specimens haveretained their original mineralogicalcomposition as indicated by their aragonitic nature.
Results of these analyses are summarized in Table 1. The standard errors
attached are derived from counting statistics (a l ). Th 230 ages are calculatedon the assumption that samples were
initially free of Th 230 and that all themeasured Th 230 have originated only
postmortemly from the disintegration of
its parent U 23 4.

Discussions
The following evidences suggest that
all of the estimated Th 230 ages in Table
1 are reliable. First, the specimens are
entirely free of recrystallization, as

shown by the absence of calcite. Second,
the Th23°jTh232 ratios are high comparedwith values of 1 to 2 which are commonly found in natural waters (KAUFMAN
and BROECKER, 1963; THURBER et ai.,
1965; V ALLENTINE and VEEH, 1969; OMURA, 1976). A measurable but small amountof Th 232 may have resulted from terrigenous materials which could not be
removed from the cavity of corallites.
Even if Th 230 was contaminated altogether with Th 232 , most of Th 230 havealready decayed out by the present.
Hence, the influence of contaminant
Th 230 upon the Th 230 jU234 ratios fromwhich ages are calculated must be verysmall. Finally, the average U234jU 238
ratio of 1.10±0.01 is consistent withTh 230 age of 120,000 years, considering
the ratio at which U234jU238 changes
from 1.14 (Ku et ai., 1977) to its secularequilibrium value of 1.00.
It is estimated from the Th 230 jU 23 4
ratios that the Hiradoko Shell Bed wasformed 120,000±8,000 years ago and theAkio OMURA

250

Uji Shell Bed, 120,000±9,000 years ago(Table 1). It may, therefore, be concluded that both shell beds were formedat the same time, approximately 120,000
years ago. These ages suggest that the
Hiradoko Terrace including these shell
beds is certainly correlative with the
Shimosueyoshi Terrace in the southern
Kanto area, because the latter has been
dated to be 120,000 to 130,000 years old
by the fission track method (MACHIDA
and SUZUKI, 1971). The C14 dates, particularly of 21,200± 1,200 years for the
U ji Shell Bed, reported by FU]II (1969),
are less reliable than Th 230 dates shownin Table 1, because a small amount (onlya few percent in weight) of contamination of modern carbonate can make anapparent C14 age in the range of 20,000
to 30,000 years old.
A preliminary analysis of oxygen isotope ratio (00 18 ) was also carried out onsome molluscan shells which were conspicuously occurred as a common species
in both shell beds. As shown in Table
2, 00 18 values obtained from samples ofthe Hiradoko Shell Bed are 0.3 per mil
for aragonitic and 0.5 per mil for calcitic
shells lower than those of the Uji Shell

Bed. It may be estimated that the Hiradoko Shell Bed was formed in a water
temprature of approximately 1 to 2°C
higher than that of the U ji Shell Bed
using the equation of HORIBE and OBA(1972) and also assuming that the differences in 00 18 value are due to thewater temperature of the environment
where each shell bed was formed. Therefore, it may safely be assumed that the
Hiradoko Shell Bed was formed on ashallower sea bottom than the U ji Shell
Bed during the same high sea stand.
Although the nature of substrata also
should be one of the important factors
controlling the molluscan assemblage as
pointed out by MATSUURA (1977), somedifferences in faunal composition of these
two shell beds, which were emphasizedby HQRG (1961), appear to have beencaused essentially by the difference intheir inhabiting depth reflecting thesubmarine topography at that time.
Shoreline features standing at 2 to 10
m above the present sea level have beenfound in many places of the world, andthey are thought to represent a eustatic
high sea stand that occurred approximately at 120,000 years B. P. (e. g. OSMOND

Table 2. 00 18 values of some molluscan shells from Hiradoko
and Uji Shell Beds. Parenthesized figures mean number of specimens analyzed.
Shell Bed

Hiradoko

Material

0018SMOW

Aragonite
Callista chinensis (13)Strombus japonicus (5)-1. 02±0. 22

CalcitePecten albicans (6)-0. 22±0. 20

Aragonite
Callista chinensis (11)-0. 72±0. 31

CalcitePecten albicans (6)+0. 26±0. 24

Uji

713.

Age of Hiradoko and Uji Beds

et ai., 1965; VEEH, 1966; BROECKER et ai.,
1968; KONISHI et ai., 1974; Ku et al., 1974).
The marine terraces correlated with thishigh stand age are traced almost continuously around the Noto Peninsula.
The former shorelines for the terraces
correlative with the Hiradoko Terrace
are, however, not within the 2 to 10 m
range of elevations because of the tectonically active nature of this area.
For example, OTA (1975) concluded thatthe height of the former shoreline for
the Hiradoko Terrace varies from 110 m
at the northern end of the peninsula to
20 m in the south and that the peninsula
could be divided into eight blocks, eachof which seemed to tilt south or southeastwards on the basis of the height
distribution of the former shorelines.
The elevation of the former shoreline
for the Hiradoko Terrace is close to 70
m above the present sea level near Hiradoko, Suzu City (OTA and HIRAKAWA,
1979). The Hiradoko Upper Shell Bed
may, therefore, be interpreted as having
been deposited in waters of about 40 m
deep. This estimation is consistent withthe bathymetric range inferred by themolluscan faunal analysis of MATSUURA(1977). Assuming that the Hiradoko
Terrace was formed 120,000 years ago,
when sea level stood eustatically 2 to
10 m in higher than the present, there
appears to have occurred a tectonic
uplift on the order of between 60 and
68 m in this segment of the coast during
the past 120,000 years, or as approximate
average uplift rate of 0.5 to 0.6 m per
1,000 years. These rates of uplift canbe estimated also for other parts of theNoto Peninsula where the Hiradoko Terrace is preserved. A maximum rate of
the uplift is 1.2 m per 1,000 years in thenorthern end and a minimum, 0.4 m per
1,000 years in the south of the peninsula.

251

Acnowledgments. The author is mostgrateful to Mr. Kazunori MORI, an undergraduate student of the Departmentof Earth Sciences, Faculty of Science,
Kanazawa University, for his effort topick up a great number of those small
solitary coral specimens from the Hiradoko Shell Bed. Thanks are also due toProf. K. KONISHI of the Kanazawa University for his continuous encouragement
throughout this study and for reading
the manuscript, and to Dr. Kei MORI of
the Institute of Geology and Paleontology,
Faculty of Science, Tohoku University,
for his valuable suggestion for identification of the coral samples. The alpha
spectrometries of uranium and thorium
isotopes were taken by means of thecounter system in the Low Level Radioactivity Laboratory of the Kanazawa
University. A part of this work was
financed by a Grant-in-Aid (No. 464265)
for Scientific Research from the Japanese
Ministry of Education.
References
ASAKO, K. (1938): Geologic age of the Hira·
doko Shell Bed (in japanese). Jour. Ceol.
Soc. Japan, vol. 45, p. 321-322.
BROECKER, W. S. (1963): A preliminary eva·
luation of uranium series inequilibrium as
tool for absolute age measurement on
marine carbonates. Jour. Ceophys. Res.,
vol. 68, p. 2817-2834.
---, THURBER, D. L., GODDARD, ]., Ku, Teh.
Lung and MATTHEWS, K. j. (1968) : Milan·
kovitch hypothesis supported by precise
dating of coral reefs and deep·sea sedi·ments. Science, vol. 159, p. 297-300.
FUJII, S. (1969): 0-' dates of three shell
beds indicating high sea stand (in japa.
nese). Earth Science (Chikyu Kagaku) ,vol. 23, p. 216-218.
- - (1976): The problem of the Uji Trans·
gression (in japanese with English abo
stract). Bull. Japan Sea Res. Insf., Ka.
nazawa Univ., no. 8, p. 27-35.

252

Akio OMURA

Hokuriku Quaternary Research Group (1961) :Quaternary deposits on the marine terrace of Hiradoko, Noto Peninsula, Central
japan (in japanese with English abstract).
Earth Science (Chikyu Kagaku) , no. 54,
p. 1-19.
HORlBE, S. and OBA, T. (1972): Temperature scales of aragonite-water and calcitewater systems (in japanese with English
abstract). Fossils (Kaseki) , nos. 23/24,
p. 69-79.
KASEl'O, Y. and HIRAYAMA, T. (1976): Topography and geology of Suzu City (injapanese). in "History of Suzu City" (edit.
K. WAKABAYASHI), vol. 1, p. 47-110.
KAUFMAN, A. and BROECKER, W. S. (1965):
Comparison of Th 230 and C14 ages for carbonate materials from Lakes Lahontan
and Bonneville. Jour. Geophys. Res., vol.
70, p. 4039-4054.
KONISHI, K., OMURA, A. and NAKAMICHI, O.
(1974): Radiometric coral ages and sea
level records from the Late Quaternary
reef complexes of the Ryukyu Islands.
Proc. 2nd Int. Coral Reef Symp., vol. 2,
p. 595-613.
Ku, Teh-Lung, KIMMEL, M.A., EASTON, W. H.
and O'NEIL, T. j. (1974): Eustatic sea
level 120,000 years ago on Oahu, Hawaii.
Science, vol. 183, p. 959-962.
- - , KNAUSS, K. G. and MATHIEU, G. G.
(1977): Uranium in open ocean: concentration and isotopic composition. DeepSea Res., vol. 24, p. 1005-1017.
MACI-IIDA, H. and SUZUKI, M. (1971) : Absolute
age of volcanic ash and chronology ofthe late Quaternary by fission track
method (in japanese). Kagaku, vol. 41,
p. 263-270.
MATSUURA, N. (1977) : Molluscan fossils fromthe Late Pleistocene marine terrace deposits of Hokuriku region, japan Sea sideof Central japan. Sci. Rep., Kanazawa
Univ., vol. 22, p. 117-162.
MOCHIZUKI, K. (1932): Hiradoko Shell Bed
and the Tertiary formations around theSuzu Cape (in japanese). - Jour. Geol.
Soc. Japan, vol. 39, p. 26-37.

MORI, K. (1976, ms): The marine terracesin the northeastern region of Noto Peninsula, Central japan (in japanese withEnglish abstract). Grad. Thesis, Dept.
Earth Sci., Fac. Sci., Kanazawa Univ.,
46p.
OMURA, A. (1976): Thorium and protactinium isotopes in some present-day hermatypic corals and their implications todating. Trans. Proc. Palaeont. Soc. Japan,
N. S., no. 101, p. 271-290.
OSMOND, j. K., CARPENTER, j. R. and WINDOM,
H. L. (1965): Th 230 /U234 age of the Pleistocene corals and oolites of Florida. Jour.
Geophys. Res., vol. 70, p. 1843-1847.
OTA, Y. (1975): Late Quaternary verticalmovements in japan estimated from deformed shorelines. Quaternary Studies,
Royal Soc. New Zealand Bull., vol. 13,
p. 231-239.
- - and HIRAKAWA, K. (1979): Marine terraces and their deformation in Noto
Peninsula, japan Sea side of Central
japan (in japanese with English abstract).
Geogr. Rev. Japan, vol. 52, p. 169-189.
SAKANOUE, M., KONISHI, K. and KOMURA, K.
(1967): Stepwise determination of thorium, protactinium and uranium isotopes
and their application for geochronologicalstudies. Radioactive Dating and Methodsof Low-Level Counting, IAEA, Vienna,
STI/PUB/152, p. 313-329.
THURBER, D.L., BROECKER, W.S., BLANCHARD,
R. L. and POTRATZ, H. A. (1965) : Uranium
series ages of Pacific atoll coral. Science,
vol. 149, p. 55-58.
UJIIE, H. (1975): Geological history of thejapan Sea; revealed by sediments (injapanese). Natural Sciences and Museum,vol. 42, p. 55-66.
VALLEl'TINE, j.W. and VEEH, H.H. (1969):
Radiometric ages of Pleistocene terracesfrom San Nicolas. Geol. Soc. Amer. Bull.,vol. 80, p. 1415-1418.
VEEH, H. H. (1966): Th 230 /U238 and U234/U238
ages of Pleistocene high sea level stand.
Jour. Geophys. Res., vol. 71, p.3379-3386.

713.

Age of Hiradoko and Uji Beds

fjg~~f-9i;iZ*:f;> J: l1~i'i§lffi!.}j0)1'&M~{-\,;:~{*-lj-:/~'

253

fjg~~£**~Hil'dthO)iZ*:f;> J: u~ ~i'i§lffil.J!ipG(Cylindrophyllia minima C Heterocyathus japonicus)~ ~I±\ L.,

Th 230 JiX;*$KJ:~~, ~hGO)~M~~~*~ko~O)M*, ~ffi!.J!~~-~.**M OOI~OOO~m O).~~~~, ~ffi!.J!~~biZ*_fr~A.~hO)T**_frc~~~h~~c~MG
iJ'K.. tt. ~ t.:o tJ::f;>. 1JE~lU 1J:tl1ffllij~h ~ ~t.:~ffi!.J!rEl'O)iilkf*!fJb~l1W~~o)~It., ~-.*1\tt::.
:f;>vt~i?{Wi[~v::'J:~c%"*-Gh~o ~O)~clt., ~ffi!.J!rEl'O);J:I<~ff!c L-~ ~.-r~ Callista
chinensis :f;> J: l1 Pecten albicans ltl!:0)7~i¥Jtt. 00 18 {j@:O)illU~M*iJ' G >b .R*~h~ ;J:
kiZ*_frmiO) IS rrf,H!il%[l{iJ , G, iZ*1'J)[[-C'~U[h«iJ O)~JD1:~!fJb~~iJ~ 0.5-0.6 mil, 000 yr -C.
~ ~, flg~~f-£~~~~ V(.7,<.td11;tr, ~O)Jft:*iJ~;fti'iflij{'J)[[O)~'{:J 1. 2 mil, 000 yr, Jft:/N~ffif5il0) 0.4 mil, 000 yr -C'~ ~ ~ iJ~Ht~ ~ h ~:kHMtlli0c0Trans. Proc. Palaeont. Soc. Japan, N. S., No. 117, p. 254, April 30, 1980

SHORT NOTES
18.

A NOMENCLATURAL NOTE ON NEOPROETUS (PARAPROETUS)
TEll CHI KOBA YASHIJapan Academy, TokyoandT AKASHI HAMADA
Department of Earth Science and Astronomy, College of General
Education, University of Tokyo

A new subgeneric name, Neoproetus(Siciliproetus) is proposed for Neoproetus(Paraproetus) KOBAYASHI and HAMADA,
1979 which was founded on Phillipsia
sicula GEMMELLARO, 1892 (Permian trilobite, Sicily), as its type-species, because
it is preoccupied by Paraproetus PRIBYL,
1964 (type-species: Proetus gil'vanensis
NICHOLSON and ETHERIDGE, 1879, Ordovician trilobite, Scotland). The authors

cordially thanks to Dr. C. BRAUCKMANN
for calling them attention to the homonymy.

Reference
T. and HAMADA, T. (1979):
Permo-Carboniferous trilobites from Thailand and Malaysia. Ceol. Palaeont. Southeast Asia, vol. 20, p. 1-21, pIs. 1-3.

KOBAYASHI,

Received Jan. 30, 1980

254

Trans. Proc. Palaeont. Soc. Japan, N. S., No. 117, pp. 255-263, pI. 30, April 30, 1980

714.

A NEW CHLAMYS FROM THE SHITAKARA FORMATION
OF THE URAHORO GROUP, KUSHIRO COAL FIELD,
EASTERN HOKKAIDO*YUT AKA HONDA
Department of Earth Science, Mie University,
Kamihama, Tsu 514

Abstract. The Shitakara Formation of the Urahoro Group in the Kushiro coal
field, eastern Hokkaido, is mainly composed of gray fine-grained sandstone, pebbly
to granular conglomerate, and dark gray sandy siltstone, and yields abundant andcharacteristic molluscan fossils which are shallow sea or brackish water dwellers
and called the upper Ishikarian fauna (MIZUNO, 1964). The writer describes a new
species of Chlamys based on several tens specimens collected from a pebbly togranular conglomerate or fine-grained sandstone bearing pebbles and granules at
27 localities in the Tokomuro, Ombetsu and Kamicharo districts, western andcentral parts of the coal field. The new species is compared with the other speciesof Chlamys described from Oligocene or Oligo-Miocene formations of Japan and
Sakhalin, USSR. It is considered to include several undescribed species of Chlamys
which have been reported under some invalid specific names from the Shitakara
and Tenneru (or Tenneru Conglomerate Member) Formations of the Urahoro Groupat various localities of the coal field.

or six (KAIHO, 1977MS, eastern area)
formations; and they are the Rushin(Beppo, Harutori and Tenneru), Yubetsu,
Shitakara and Shakubetsu Formations.
The Shitokara Formation was proposedby SASA (1940) and its type locality is
located around the Yubetsu Coal Mine,
Shiranuka-machi, Shiranuka-gun, central
part of the coal field. The formation
name has been applied to every part ofthe coal field. The formation developedin the Tokomuro, Ombetsu and Kamicharo districts, western and central partsof the coal field, is composed of grayfine-grained sandstone, pebbly to granularconglomerate and dark gray sandy siltstone. These lithologies gradually gradeswith each other laterally. The conglo-

Introduction and Acknowledgments

The Paleogene Urahoro and Ombetsu
Groups developed in the Kushiro coal
field, eastern Hokkaido, yield abundantand characteristic molluscan fossils,
which are called the upper Ishikarianfauna and the Poronaian fauna, respectively (MIZUNO, 1964).
The Urahoro Group, which is unconformably underlain by the Nemuro Group
with unconformity and is in turn overlain
by the Ombetsu Group with unconformity or partial unconformity, can bedivided into four (Yur, 1975MS; HONDA,
1977MS; KAIHO, 1977MS; western area)* Received October 20, 1979; read at 124th
Meeting of the Society in Nagoya.

255

256

Yutaka HONDA

Table 1. Correlation table in the Tokomuro ((I); YUI, 1975MS), Ombetsu ((II) ; HONDA, 1977MS, partly revised), and Kamicharo (western (II) and eastern (III) areas; KAIHO(1977MS) districts. (1), Ichigozawa Coal-bearing Member; (2), or Kamicharo Formation(unconformably overlain by the Terrace deposits and conformably underlain by the Nuibetsu Formation); (a), or conformity between the Kamicharo and Nuibetsu formations; (b),or partial unconformity.
(I)

(II)

AGE~

(III)

FORMATION (MEMBER)

Holoc.

Alluvium

Alluvium

Alluvium

Pleist.

Terrace deposits

TerracedeQosits

Terracede osits~I~~./

Hombetsu Formation~~IIlIHIII\J lLUll UlUIl

Co

Sh i ranu k a Format ion

:J

o

Q)

C
Q)

u

cD
.~

.

.

upperpart

Atsunai Formation._o ii: Atsu nal Formation lowerqP.art~ ~ fl,[1 II[ 11lli il f\7tTokomuro ""'F';".-r-""II1'(111L'r1'Jl'5-'T~ok~o~m~u~ro~F~.(2~)"""+".>-.JKa""'m""'i.Ac""'ha""'rV<o"""FoW.r.umJ.,,at""'io""'nlAAJ"""-ig- Nuibetsu

o

cD
:J
VI

a;

upper p.
lower partF.

1l1H[l Nuibetsu Formation a

Charo Formation..0

Charo Formation

Nuibetsu Formation

Charo Formation/RushinQawa Tuff breccia M.

E0i-="1..,.01'Yrm..,.ayjg;:,.ayr~i~F~o~r~m_a~t""i_o""no/V'VV'~""",'V'jr~Ovm"",a..;::g",a/'or",,i~F",o~r~mvaV'-'t'Vio'\,,(nb 0 mag a r i For mat ion
<11

c

<11

.1111 Shaku betsu F.

Shakubetsu F.

Shitakara Formation

Shitakara Formation

Yubetsu Formation

Yubetsu Formation

Rushin Formation

Rushin Formation

u
0
01
.-

Co
:J

- ....

00<.!)

Shakubetsu F.

I upper mem ber
Shitakara LmiddlememberF.
lower member
Yubetsu I Soun Siltstone Member
F. IVubetsu Coal-bearing M.

0Tenneru Formation

(;
£
I'll

....

~~~~~~~~7<'-~~~~~

7~.
;r; '-'
~ 0
I.

~

2

~

~

~

z

u-;~;rIrllilill

H arutori Formation
Beppo Formation

Kawaruppu~ KawaL....._p_a_r_t_I.}-=:......~u:....+,"TTrnrrr"T"T:,.F~o.:,..rm:.;.:,:a;.:t.;.:io;..;n~ruppu
1

1:..1<

I.

F.

lower part

Katsuhira Formation

merate consists predominantly of red
chert gravels. In the northeastern partof the area (KAIHO, 1977MS, eastern area),
the formation generally demonstrates anupward succession of sandstone, sandy
siltstone and sandstone, and these units
are termed into the lower, middle andupper members, respectively. The forma-tion attains a thickness of 100 to 200 m.
The formation is conformably underlain and overlain by the Yubetsu andShakubetsu Formations, respectively. Its
base is defined by a fine-grained sandstone, which gradually grades downward
into a very fine-grained sandstpne of theunderlying Yubetsu Formation. The top

714. Chlamys from the Kushit·o Coal Field

s

SK-2
SK-3
SK-4

~ Su
~/'

'G

~<.

~

Fig. 1. Map of the Ombetsu district indicating fossil localities. (Localities 8-02
and 8-06 of the Tokomuro district are situated in the western perimeter of theOmbetsu district; and localities SKK-5, and SKK-12 of the Kamicharo district aresituated in the northeastern perimeter of the Ombetsu district).

257

258

Yutaka HONDA

of the formation is defined by a conglomerate coming a mudstone which isintercalated with coal seams of the lower
part of the Shakubetsu Formation. A
stratigraphic correlation table covering
the Tokomuro, Ombetsu and Kamicharo
districts is shown in Table l.
The Shitakara Formation yields molluscan fossils which are shallow sea orbrackish water dwellers. The fauna includes such species as Mytilus mabuchii
OYAMA and MIZUNO, Chlamys shitakaraensis, n. sp., Ostrea eorivularis OYAMA
and MIZUNO, Corbicula sitakaraensis SUZUKI, Nemocardium ezoense TAKEDA, N.
TAKEDA,
Hubertschenckia
yokoyamai
ezoensis (YOKOYAMA), Macoma sejugata(YOKOYAMA), Mya grewingki grewingki
MAKIYAMA, M. grewinglli kusiroensis
NAGAO and INOUE, Thracia n. sp., "Ampullina" asagaiensis MAKIY AMA, etc.
A total of seven species of Chlamys,
which are much fewer than those known
from Neogene formations of Japan, hasbeen described from Oligocene or OligoMiocene formations of Japan by several
authors; and these are Chlamys akahirensis KANNO, 1958, from the Nenokami
Sandstone of Saitama Prefecture, Ch. (s.
s.) ashiyaensis (NAGAo, 1928) from the
Yamaga and Wakita Formations of Fukuoka Prefecture, Ch. (s. s.) misakiensis
KATTO, 1960 from the Misaki Formationof Kochi Prefecture, Ch. (s. s.) nagaoi
MASUDA, 1962, from the Wakita Formation of Fukuoka Prefecture, "Ch." onishibetsensis KUBOTA, 1951, from the Onishibetsu Formation of Hokkaido, Ch. (Coralichlamys?) rutteni MARTIN of MIZUNO(1952) from the Fukuura Tuff of theOshima Formation of Nagasaki Prefecture,
and Ch. (s. s.) sakitoensis (NAGAO, 1928)
from the Itanoura Formation of Nagasaki Prefecture (compiled from: HATAI
and NISIY AMA, 1952; MASUDA, 1962a;
MASUDA and NODA, 1976). Among these

species, Ch. rutteni of MIZUNO(1952) is considered to be a synonym of Ch. sakitoensis
as treated by MASUDA (1962a).
In the present paper, the writer describes and discusses a new species ofChlamys based on several tens of specimens collected from the Shitakara Formation of the Urahoro Group in thewestern and central parts of the Kushiro
coal field. A map of the Ombetsu district indicating fossil localities is shownin Fig. l.
The writer expresses his deep gratitude to Professor Tamio KOTAKA, Institute of Geology and Paleontology, Tohoku University, for his continuous encouragements during the course of thepresent study and his critical reading of
the manuscript. Deep appreciation is also
expressed to Professor Koichiro MASUDA,
Department of Geology, Miyagi University of Education, and Dr. Kenshiro
OGASAW ARA, Institute of Geology andPaleontology, Tohoku University, fortheir valuable advice to the present
study. The writer is also indebted to
Mr. Shohei OTOMO of the Tohoku University for his aid in photographic work.

Description of New Species

Family Pectinidae
Subfamily Chlamydinae
Genus Chlamys RODING, 1798
Chlamys shitalwraensis HONDA, n. sp.
PI. 30, Figs. 1, 2, 5, 6

Description :-Shell moderate to large,
rather thin, sub orbicular, somewhat inequi lateral and weakly inflated. Heightof shell nearly equal to length. Anterior
and posterior dorsal margins nearlystraight, and connected with well-roun-714. Chlamys from the Kushiro Coal Field
Table 2.
IGPS colI. cut.

Measurements (in mm.) of Chlamys shitakaraensis, n. sp.

Lac. no.

HeightLengthH/L (%)

HL

AHL

PHL

AHL/PHLAA

No. of ribs

Valve95439 (Holotype)

B-06

53.0

57.1

92.8

41. 3

25.3

16.0

1. 58

101"

23

Right

96213 (Paratype)SK-3

ca. 63ca. 60

105

31. 9

19.2

12.7

1. 51

98"

21+

Left

(Paratype)

SK-26

46.0

47.4

97.0

27.9

17.4

10.5

1. 66

102 0

26

Left

96215 (Paratype)

SK-28

82.4

ca. 84

98.1

46.6

29.8

16.8

1.77

100"

25

Right

96216

SK-40

74.9

--

-

-

-

-

-

-

23+

Right

96214

no.

259

HL, hinge-length, AHL, anterior hinge-length; PHL, posterior hinge-length; AA, apical angle

ded ventral margin. Apical angle about
100
Surface sculptured with about
more than 25, distinct, roundly topped,
granulated radial ribs; which are wider
than the in terspaces in right valve, andmuch narrower in left valve. Radialribs with one distinct longitudinal furrow. Each interspace is sculptured with
one, finely granulated radial thread.
Auricles large, distinct; anterior ear
about 1.5 times as long as posterior one;anterior ear of right valve oblong, withrather wide byssal area and deep byssal
notch. Anterior and posterior ears ofleft valve trigonal, truncated both anteriorly and posteriorly at about rightangle.
Anterior and posterior ears sculptured
with about six to seven granulated radialribs and fine concentric growth lines.
Internal surface of shell folded corresponding to external sculpture; auricular crura developed and resilial pit
deep.
Comparison and Affinities:- The present
species resembles Chlamys akahirensis
KANNO (1958, p. 167, pI. 1, figs. 13a, b),
described from the Nenokami Sandstoneof the Ushikubitoge Formation of Saitama
Prefecture, Central Japan, but the former
differs from the latter by its less inflated
right valve, smaller number of radialribs and smaller apical angle.
It resembles Ch. (s. s.) ashiyaensis NAGAO (1928, p. 39, pI. 8, figs. 2, 5, 17, pI.
9, figs. 1, 2, 9, 20, 21; non pI. 9, fig. 10),0•described from the Yamaga Formationof the Ashiya Group of Northern Kyushu, but it is distinguished from thelatter by its lower shell and morerounded radial ribs.
The present species is somewhat allied
to Ch. (s. s.) matchgarensis MAKIY AMA(1934, p. 133, pI. 3, figs. 7, 8), describedfrom horizon 5 (Marie Formation, vide
Oy AMA, MIZUNO and SAKAMOTO, 1960)
of Matchgar, northern Sakhalin, USSR,
but it can be discriminated from thelatter in its smaller shell and muchsmaller number of radial ribs.
Remar/zs :-Many but mostly fragmental specimens were collected from apebbly to granular conglomerate or grayfine-grained sandstone facies bearing
pebbles and granules of the Shitakara
Formation.
The present species probably includes
the following undescribed specimens
which were reported from the Shitakara
and Tenneru Formations, under someinvalid names (nom. nud.): Chlal7lYs
kushiroensis UOZUMI (T ANAl, 1957, p. 21,
table 1; MIT ANI, HASHIMOTO, YOSHIDA
and ODA, 1959, p. 19; T ANAl and Y AMAGUCHI, 1965, p.5), Ch. kusiroensis UOZUMI(MATSUI, FURUHATA and FU]lE, 1953a,
fig. 1, p. 9, fig. 6; 1953b, fig. 1), CIl. /msiroensis TAKEDA (MATSUI, 1962, table 5),
Ch. mabucllii MIZUNO (MIZUNO and Hy AKKOKU, 1960, p. 19, p. 34, table 3; SATO,
NAGAHAMA and YOSHIDA, 1961, table 3;
MABUCHI, 1962, p. 11), and Ch. sp. (INOUE

260

Yutaka HONDA

and SUZUKI, 1962, p. 19; SOGABE, 1967,
p. 16) from the Shitakara Formation;
Ch. mabuchii MIZUNO (MIZUNO, 1964, p.
9, table 4; p. 10, table 5) from the "Tenneru Formation" and the Shitakara Formation; Ch. sp. (KAWAI, 1956, p. 19, table4) from the Tenneru Conglomerate
Member of the Chorobetsu Formation.
The Tenneru Formation is correlativewith the upper part of the Rushin Formation of the Kushiro coal field.
Associated fauna:- The present species
is commonly associated with Nemocardium ezoense TAKEDA (PI. 30, Fig. 3) andOstrea eorivularis OYAMA and MIZUNO(PI. 30, Fig. 4) and sometimes with Corbicula sitakaraensis SUZUKI, Mya grewingki kusiroensis NAGAO and INOUE,
Callista sp., etc.
MIZUNO (1964) recognized four molluscan assemblages in the Shitakara Formation in the Kushiro coal field, and his"IV assemblage" found in a coarse- tomedium-grained sandstone is characterized by Chlamys mabuchii MIZUNO (MS)and is associated with Mytilus, jvJodiolus,
Corbicula, Pitar, Callista, Spisula, Calyptraea, Buccinulum, Nemocardium, Ostrea,
Polinices, etc.
Locality and Formation:B-02: a northwestern tributary of theTokomuro-gawa, Urahoro-machi, Tokachi-gun, Hokkaido (Lat. 42° 55' 10"N,Long. 143° 42' 38"E; Coll. Yur, 1975MS).
B-06: a small northeastern tributary of
the Urahoro-gawa, about 3.8 km northof Rushin, Urahoro-machi, Tokachi-gun,
Hokkaido (Lat. 42° 56' 55"N, Long. 143°
40' OO"E; Coll. Yur, 1975MS) (Typelocality).
SK-2: a roadside cliff along the Chambetsu-gawa, Ombetsu-machi, Shiranukagun, Hokkaido (Lat. 43° 00' 26"N, Long.
143° 49' 44"E).
SK-3: a river bed of the Chambetsugawa, Ombetsu-machi, Shiranuka-gun,

Hokkaido (Lat. 43° 00' 21"N, Long. 143°
49' 53"E).
SK-4: a river side cliff along the Chambetsu-gawa, Ombetsu-machi, Shiranukagun, Hokkaido (Lat. 43° 00' 15"N, Long.
143° 50' ll"E).
SK-lO: a river bed of the upperstreamof the Shibetsu-zawa, a tributary of
the Muri-gawa, Ombetsu-machi, Shiranuka-gun, Hokkaido (Lat. 42° 55' 28"
N, Long. 143° 47' 18"E).
SK -12: a river side cliff along the middle course of the Shibetsu-zawa, atributary of the Muri-gawa, Ombetsumachi, Shiranuka-gun, Hokkaido (Lat.
42° 55' 50"N, Long. 143° 47' 27"E).
SK-14: a river bed of the Shibetsu-zawa,a tributary of the Muri-gawa, Ombetsumachi, Shiranuka-gun, Hokkaido (Lat.
42° 55' 45"N, Long. 143° 47' 33"E).
SK-20: ditto (about 750 m lowerstreamof SK-12) (Lat. 43° 56' ll"N, Long.
143° 47' 47"E).
SK -21: a river side cliff along the Shibetsuzawa, a tributary of the Muri-gawa,Ombetsu-machi, Shiranuka-gun, Hokkaido (Lat. 42° 56' 21"N, Long. 143°
48' 7"E).
SK-26: a river side cliff along the upperstream of the Shakubetsu-gawa, Om betsu-machi, Shiranuka-gun, Hokkaido(Lat. 42° 54' 36"N, Long. 143° 48' 00"
E).

SK-27: ditto (about 3 m lower horizonof SK -26) (Ditto).
SK-28: ditto (about 25 m lowerstream of
SK-27) (Lat. 42" 54' 36"N, Long. 143°
48' 2"E).
SK-29: a river bed of the Shakubetsugawa, Ombetsu-machi, Shiranuka-gun,
Hokkaido (Lat. 42° 54' 45"N, Long. 143°
48' 2"E).
SK -31 : a river side cliff along the Shakubetsu-gawa, Ombetsu-machi, Shiranukagun, Hokkaido (Lat. 42° 54' 34"N, Long.
143° 48' 9"E).

714-

Chlamys from the Kushi1-o Coal Field

SK-33: a river side cliff along the Unnaizawa, a tributary of the Chokubetsugawa, Uraharo-machi, Tokachi-gun,
Hokkaido (Lat. 42° 53' 15/1N, Long. 143°
46' 2/1E).
SK-38: a river side cliff along the Chokubetsu-gawa, Tokachi-gun, Hokkaido(Lat. 42° 53' 3°N, Long. 143° 47' 33/1E).
SK-39: ditto (about 25 m SW of SK-38)(Lat. 42° 53' 3/1N, Long. 143 ° 47' 33/1E).
SK-40: a river side cliff of the Rubeshubezawa, a tributary of the Chokubetsugawa, U rahoro-machi, Tokachi-gun,
Hokkaido (Lat. 42° 52' 47/1N, Long.
143° 47' 22/1E).
SK-41: a river side cliff along a small
southern tributary of the Rubeshubezawa, a branch of the Chokubetsugawa, U rahoro-machi, Tokachi-gun,
Hokkaido (Lat. 42° 52' 45/1N, Long.
143° 47' 20/lE).
SK -42: ditto (about 120 m NE of SK -41)
(Lat. 42° 52' 49/1N, Long. 143° 47' 22/1E).
SK-46: a river bed of the upperstreamof the Sango-zawa, a tributary of the
Chokubetsu-gawa, Urahoro-machi, Tokachi-gun, Hokkaido (Lat. 42° 52' 10/lN,
Long. 143 45' 49/1E).
SK-48: ditto (about 40 m lowerstream of
SK-46) (Lat. 42° 52' ll/lN, Long. 143°
45' 51/1E).
SK -51: ditto (about 90 m ENE of SK -48)
(Lat. 42° 52' 13"N, Long. 143° 45' 56"E).
SKK -2: a river bed of the Satombetsugawa, 5,980 m upperstream from themouse of the valley, Ombetsu-machi,
Shiranuka-gun, Hokkaido (Lat. 43° 5'
16"N, Long, 143° 49' 38"E ; ColI. KAIHa,
1977MS).
SKK -5: a river side cliff of the Shutonaigawa, 5,550 m upperstream from themouse of the valley Shiranuka-machi,
Shiranuka-gun, Hokkaido (Lat. 43° 6'
13/1N, Long. 143° 49' 51/1E; ColI. KAlHa,
1977MS).
SKK -12: a river side cliff along the0261

Nananosawa, a tributary of the ShinNuibetsugawa, Shiranuka-machi, Shiranuka-gun, Hokkaido (Lat. 43° 8' 15/1N,Long. 143° 56' 33/1E; Coli. KAlHa,
1977MS).
All the localities are of the Shitakara
Formation and locality SKK-12 represents the lower part of the Shitakara
Formation.
References
HATAI, K. and NISIYA:VIA, S., 1952, Checklist of Japanese Tertiary marine Mollusca.
Sci. Rep., Tohoku Univ., 2nd Ser. (Geol.),
Spec. vol. 3, p. 1-464.
HONDA, Y., 1977MS, [Stratigraphical study
in the western area of Ombetsu, eastern
HokkaidoJ. Master's Thesis, Inst. Ceol.
Paleont., Tohoku Univ., 85+ 15 p., 4 pIs.
(in Japanese, title translated)
INOUE, E. and SUZUKI, T., 1962, Explanatory
text of the geological map of Japan.
Scale 1: 50,000. Ukotakinupuriyama. 72p., Hokkaido Development Agency (inJapanese with English abstract).
KAIHO, K., 1977MS, [Geology of the middle
and upper courses of the Ombetsu-gawa,Ombetsu-machi, and the Charo-gawa,Shiranuka-machi, Shiranuka-gun, Hokkaido]. Crad. Thesis, Inst. Ceol. Paleont.,
Tohoku Univ., 81 p. (in Japanese, title
translated) .
KA~NO, S., 1958,
New Tertiary molluscs
from the Chichibu Basin, Saitama Prefecture, Central Japan. Sci. Rep., Tokyo
Kyoiku Daigaku, Sec. C, vol. 6, no. 55,
p. 157-229, pIs. 1-7.
KATTO, J., 1960, Some molluscan fossils andproblematica from the Shimanto terrainof Shikoku, Japan.
Res. Rep., Kochi
Univ., vol. 9, no. 9, p. 107-115, pIs. 1-2.
KA IVAI, M., 1956, Explanatory text of thegeological map of Japan. Scale 1: 50,000.
Kombumori. 59+8 p., Ceol. Surv. Japan(in Japanese with English abstract).
KUBOTA, K., 1951, A new Chlam),s from
Onishibetsu
Formation of Hokkaido.
Mineral. and Ceol., vol. 4, nos. 5-6, p.
158-159 (in Japanese).
MABUCHI, S., 1962, A study on sedimenta-

262

Yutaka HONDA

tion and tectogenic history of the Paleogene System of the Kushiro coal field.
Contr. Inst. Ceol. Paleont., Tohoku Univ.,
no. 56, p. 1-42 (in Japanese with English
abstract) .
MAKIYA:-'IA, J., 1934, The Asagaian molluscs
of Yotukura and Matchgar. Mem. Coll.
Sci., Kyoto Imp. Univ., Ser. 8, vol. 10,
no. 2, art. 6, p. 121-167, pis. 3-7.
MASUDA, K., 1962a, Tertiary Pectinidae ofJapan. Sci. Rep., Tohoku Univ., 2nd Ser.
(Geol.), vol. 33, no. 2, p. 117-238, pis.
18-27.
- - , 1962b, Notes on the Tertiary Pectinidae of Japan. Ibid., Spec. Vol., no. 5(Kon'no Mem. Vol.), p. 159-193.
- - and NODA, H., 1976, Check list andbibliography of the Tertiary and Quaternary Mollusca of Japan, 1950-1974.494 p.,
Saito Ho-on Kai, Sendai, Japan.
MA TSUI, M., 1962, Sedimentological study of
the Paleogene basin of Kushiro in Hokkaido, Japan. Jour. Fac. Sci., Hokkaido
Univ., ser. 4, vol. 11, no. 3, p. 431-480.
- - , FURUHATA, Y. and FU]lE, T., 1953a,
Geology of the Yubetsu area, Kushiro
coal field. Pt. 1. Bull. Ceo!. Comm. Hokkaido, no. 22, p. 1-29 (in Japanese).
- - , - - and - - , 1953b, Ditto. Pt. 2.
Cenoz. Res., no. 17, p. 308-314 (in Japanese) .
II'IiTA 1\ I, K., HASHIMOTO, W., YOSHIDA, T.
and ODA, Y., 1959, Explanatory text ofthe geological map of Japan. Scale 1:
50,000. Honbetsu. 83 p., Hokkaido Development Agency (in Japanese with English
abstract) .
MIZUl\'O, A., 1952, Descriptions of the Paleo-

gene molluscs from Sakito, Nagasaki
Prefecture, Japan. Trans. Proc. Palaeont.
Soc. Japan, N. S., no. 6, p. 185-193, pI. 17.
- - , 1964, Summary of the Paleogene molluscan faunas in North Japan. Rep. Ceol.
Surv. Japan, no. 207, p. 1-28.
- - , and HYAKKOKU, H., 1960, Explanatory
text of the geological map of Japan. Scale
1: 50,000. Yubetsu. 78+7 p., Hokkaido
Development Agency (in Japanese withEnglish abstract).
NAGAO, T., 1928, Palaeogene fossils of theIslands of Kyushu, Japan. Part 2. Sci.
Rep., Tohoku Imp. Univ., Ser. 2 (Geol.),
vol. 12, no. 1, p. 11-140, pis. 1-17.
OYAMA, K., MIZUNO, A. and SAKAMOTO, T.,
1960, Illustrated handbook of Japanese
Paleogene molluscs. 244 p., 71 pis., Ceol.
Surv. Japan.
SASA, Y., 1940, Stratigraphy of the Tertiary
deposits in the Kushiro coal field andcritical review of the opinions expressed(1). Bull. Hokkaido Coal Min. Assoc.,
no. 307, p. 1-19 (in Japanese).
SATO, S., NAGAHAMA, H. and YOSHIDA, T.,
1961, Explanatory text of the geologicalmap of Japan. Scale 1: 50;000. Kamicharo. 60+7 p., Hokkaido Development
Agency (in Japanese with English abstract).
SOGABE, M., 1967, Geological maps of thecoal fields of Japan. VII. Explanatory
text of the northwestern district, Kushiro
coal field, Hokkaido. 42+3 P., Ceol.,
Surv. Japan (in Japanese with English
abstract) .
TANAI, T., 1957, Explanatory text of thegeological map of Japan. Scale 1: 50,000.

Explanation of Plate 30(All figures in natural size)
Figs. 1, 2, 5, 6. Chlamys shitakaraensis HONDA, ll. sp. fig. 1, IGPS* coli. cat. no. 96214 (Paratype), Loc. SK-26, inner mold; fig. 2, IGPS colI. cat. no. 95439 (Holotype), Loc. 8-06,
rubber cast from right valve; fig. 5, IGPS colI. cat. no. 96213 (Paratype), Loc. SK-3; fig.
6, IGPS coli. cat. no. 96215 (Paratype) Loc. SK-28.
Figs. 3a-c. Nemocardium (Arctopratulum) ezoense TAKEDA. IGPS colI. cat. no. 96250, Loc.
SK-40.
Figs. 4a, b. Ostrea eorivularis OYAMA and MIZUNO. IGPS colI. cat. no. 96251, Loc. SK-40.
* Abbreviation for the Institute of Geology and Paleontology, Tohoku University, Sendai, Japan.

HONDA:

Plate 30

Chlamys from the Kushiro Coal Field

3a

2

3b

714. Chlamys from the Kushiro Coal Field
Ombetsu. 52 p., Hokkaido Development
Agency (in japanese with Englisn abstract) .
- - and Y A:\lAGUCllI, S., 1965, Explanatory
text of the geological map of japan.
Scale 1: 50,000. Urahoro. 43 p., Hokkaido
Development Agency (in japanese with

263

English abstract).
YUI, S., 1975MS, [Stratigraphical study inthe northern part of Urahoro-machi, Tokachi-gun, HokkaidoJ. Master's Thesis,

1nst. Ceol. Palemlt., TohollU Univ., 87+(in japanese, title trans-

22 p., 10 pIs.
lated) .

Atsunai JJP3,
Beppo'i]IJilf,:,
Chambetsu-gawa 7-;- /-,",'/)11,
Charo-gawa 1H~)II,
Chokubetsu-gawa jj['i]1j II 1,
Chorobetsu 7-" ,,-'"' '/ ,Harutori ~t;"
Hombetsu *'i]I],
Kamicharo
J:"*n,
Katsuhira ii!i'JZ,
Kawaruppu JIIV1E:;(P,Muri-gawa 'Ji!l!JII,
Nanano-sawa -1::0) iR ,Shin-Nuibetsu-gawa Wj'i',.1'i]IjIlI,
Ombetsu 1f)]Ij,
Rubeshube-zawa IV-'"' Y ='- -'"'iR,
Rushin fll~,
Sango-zawa =~iR,
Satombetsu-gawa -iT r /-'"' '/ )11,
Shakubetsu-gawa R)]I])II,
Shibetsuzawa Y-'"' '/ iR,
Shiranuka 8lliR,
Shitakara '5"F,
ShGtonai-gawa Y;;:L? r 71 !II,
Soun YJ1..
J1/I, Tenneru ::R~, Tokachi -I-1m,
Tokomuro 1itil?:,
Unnai-zawa? /71 lR,
Urahoro iTll
$J\\,
Yubetsu ftlE)]1j~tmh@Jlfilll~)II11tERlIlmjl/lJ\\l\lril'tf'5"FF.ihJ'GO) Chlamys 0)-Wj';Ji]:~ti'iijJ1[*h'll,

1iJIIU~tREBO)~.=*d~$O)~.~M~J:$O).~~M~Kg~~h, ~<O)~.~~~~D~~~~~-r- 7.>0 1ltr~iO.J:. Lff&~O)~~illJ;*,ft.~Mfi-t:-h-th, J:=rm~J;)=jfYJ~M, .P3D*,M~ [J-}Ifh7.>(l'vlIzu:'>o, 1964)0 1iJllntREBf!!l$IJ'G9=':'R:$r::';lJ>\t-CO)n-il?:, 1f'i]Ij, l:*n:l1!!.!liX1:.0\.:;(P-r-7.>rr1i
Wl'i[Y Iv r :'5tJ: t:1J' GJ1l1: I), Nemocardium ezoense,
Ostrea eorivularis, Mya grewingki kusiroensis, Corbicula sitakaraensis tJ: C· O)i:li:it&tJ:
C' L-R7KttO)iIlX{HYJ*,ft.~~~EiC-r- 7.> 0 *~fi'5"FJi~O)9='~ff.!B~:'5;]: t-:li9='~ff.!B~~~~-r- 7.>;f,B]11Llij;:'59='0)27jI!L\\~iJ' G1*~ ~ht-:, ;r&TflEl~O)jWl;ifq:.;hl;-::i ~ Chlamys O)-Wj'tilt~ficjli!i; L¥Rf'!fi'"7.> 0 *;Ji]fi
1iJlI~~lREB~:l1!!.O)rr1i.~f¥'5"Fl\lrit-o .J:.lY-t:-O)TtLO)::R~~ (:R$~~:'5$~) iJ'G*t.c1li!i;0);]: ;]:¥Rf'!f~h -Cc't-:~kO) Chlamys U'1j-O)~~~;tGh7.>o;;j,III riS~.~M'5"F~Iiff.!B*-lllij;:'5, 9='~ff.!B~:'5,{tt* ,

264

PROCEEDINGS OF THE PALAEONTOLOGICALSOCIETY OF JAPAN019801f.1 Jj2513 c7) 13*~~¥gSjt~r.g~-C, 13*~~¥gSjt~.&~.m~i±lll&m*9

01 9801f.1 Jj 2413 t::.%l:rst*Sjt-C fit.l:bnt-:: :<E{JIJiW~A~t::':J:;\,'-C, /'Xc7)t-lf;gc7)A.jJHl.'c !\'iflJlj~A""c7)*lIiJ~jJR( ~nt-:: (~f*III§). [A.~J tfEBJ\¥.
~, :=tHUJ't, -gr~, *~f*tt, fti:§IIij$, ft#~~,~.~, ffiEBtf~,~#~,.M~J't(J;.JJ:IO;g19791f.li:J:: I) A.~), fra~.Iil-, j\1;j:fililjt~, ~mJ'tFa, EBP*/'X, ~*~ili,~,fti:§.Iil~,.~8, fti:§M, .m~~, fti:
§7im, JIIrEl3:t:!!~, FRYDL, Paul, lJ=JII.IHt.
._~=,fiM~~~, *~-, m$*, ~*tflJij, tJ5#Jli:-=f, JtJll8~, mJII~I'f], .M*=**J't(*tt 1l41}~

J\¥.) c7)-flBqt~iJ~jJ~~ ~nt-::. [ J F"lvi.II3~Jt
II N:mllA~~-2 N:mfflfliJtIi. ~Jt (~. {f.,.. ~ c7)\"fniJ'iJ~~i I..-H -c~tJ\nt.::-t>0)c!::9~.

[jfiJ'nt-::

tc7)~*Sjt~c7)1f.~·~~.-c~.~n~t c7) c i" ~.J

II B ~~ltlUf>l-1 lJli:mli. 111 -/ ~ IJ V -/ rei" ~.

.~fflfliJt-c~,.~,.~~z.*~-cu~~.,
LF~ll& 3 [2J :!iHlli:Ci"~.

:J:;J::

t-::t':'l..-, 5-~,P~~-=f, ~*~Z,~~Fa~, ~_fim,~*~, 1iiiEB~.Iil, *~4llM~ (J;.JJ:30;g 19801f.
Ii: J:: I) A.~)

AilU.UF"l c7)ffifUJt t::. ")\"-C Ii., c <I::' ~~~ I? n[~~J

~AilIJ.UF"l c 1..-,;g)iR*~, tf*~-,~it~~(J;.JJ: 3

t-::~1rz.~\"-c ~ll&z. #~ t.l:\".

4~m.~vi.1

iJ,") ~ll&z. )fj\"t.l:\" t c7) ci"~.

[!\'iflJIJ~~J lIli#S::=!!~, :ft1EB'$±ML m~1Jij~, m7J(*tf!!ll, jiIij~7i!!~, J\.~~, 31\f~~~OJ-J: 7 ;g)~:J:;,

8 "n.lilIJ:iltO)~3tI;l: ~IllP :!ia-~HJ3tc!:: L.,.~A.~/'Xc7)~I)-C~~ •• ~~~9, ;g~~~ 7, !\'iflJlj~~177, ~~~~359, tE
7'l-~~63, H615;g.
O~iW~~~-c1tc7)~~c7)~.qt~z. fit.l:\", '1'~1iB~ • i\T§'it~ c7) jiIij;gz. ~i±I I..- t-::. J 980 1f.1i:
1tc7)~~~vi.J:~ 2 ;gc7)v:tiJ', ~*, llt§/'X~,
fIlII;Jt8*c7) 5;g -('mlVt~n~.
019791f. 9 Jj t::.fit.l:hht-:: I*Ijl5 Sjt~c7) ta~c7) *5*,~~~·~1f.li:wSjt~~.re~~~ (~&~~¥g. 1 $)1:) t::.*~*lIc7) *§'hl~ iJ~ ~fiIi c~~~.~c7)*5*, ~1f.li:re~~~~ • • Sjt2$)1:t::. *~f**ij[,. (If/HI:), • •Sjt-Jilt 1 $)1:t::.i1f;*:=!!Il (\fIHE), ~_~m, J't.'filf, ~&~~¥g
Sjt 1 f,tt::.31\fMlll~~ (tiff· *~*1I), ,*,ttM=(tiff), *§'iW~ (*~*1I) iJ~~n.:fn F"l:<E
I..- ~ (~1fj\III§).
Oiitr~iW~~~-C !\'iflJlj1}c7) N:m • m~1.iit t::.")\',

v 7 = V - ftiUli:z. ~)fji" ~ ~ c, •.c7)~.~.&~.c7).mK.f~~c, .m
JJ~ c7)~!iJJ I) z. 4.iJ:1f. 5 Jj * 13 (t-:: t.:. I..- *1f. t::. f>lI) 6Jj*I3) ci"~~cz.$I..-1rb-1:tt-::.
-c!jjl:~ 1..-,019791f.1i: 13 *~~¥gSjt~fflfliJt1t 'i., *,Ii!;JI[-=f;gc7) "Quaternary Ostracoda from Kisarazu
near Tokyo" (¥Ii&. ~$1l21}) t::.B'l~~nt-::.
019791f.1i: 13 *~~¥gSjt~SjtVllJ1t (f;VIW SjtVllJ~.*z.~@J::I);gf*z.R~~,~m~*/'X.

;g (1itIiX!R. {tE c7) {tE Jj&Sjt(fJ~~) c ~iN;g({tE~:fL!R.z.~'L'C i" ~ ~~!I!IJ¥gc7)~~) ~::.B'l~~n~.

13 *~~¥gSjt~ 19801f.r.g~ ·1f.~vi. 19801f.l Jj
2513 (*)·2613 (±) 1::.%l:rst*Sjt*Sjt~«!!t::':J:;\,'-crmf*~nt-:: ($~;,l1H22;g).

Cretaceous-Tertiary boundary events (Copenhagen) ................. ·tfEB:=!!i>· EBft~z
The Systematics Association Symposium "TheAmmonoidea" (york) ..................... .

. . . . . . . . . . . . .. fIlIIflIl-lVt· t~*~!!~ • MiIJ.ijtJ't
Symposium on the Cretaceous major transgressions and regressions (London) ..... .

.................................. f~*~!!~~ 2 @~~i'!!l!1!!~~~ (~tJli:) .......... *tt~1Jij265
Triassic of the Tethys realm (Budapest) ....

· ................................. 'j'illiiff£:;i(~ 9 @]~~:[iJla['.§:~(Illinois) ...... ~jj.'IIJd'~lUGS 7';f :/*~Ff~~§:<D,*,~ID!i!jlt~jr.~ ......

.................................. ~EB~±

Notes on homotrematid foraminifera from
Toyama Bay, Central Japan ............. .
...... HASEGAWA, S. and TAKAYAKAGI, Y.

ttfJ11 ~{,'f, i"t:fj(;J[l{,'f<DI-1jQf¥£::Ff:rL!R~~Ff ..... .

..................................

**?fi~

tH~~{,'fO)iHL!R1G:[il:. '0l 'L ........

~

7f5 !CIU:' J: ~ tn:m JJ~ 0) ~ 1l£ iif9lHiT ...... :[iII~fI:jf1 ~;jt*fr"PtIJj~O)~~.::::*['.O) ~ 1G:[i'j,'f:UH:. '0l 'L..

· . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 'i'f!h'f'::::f(r;• ~~O)wm • • ~~~:/~~<D~~a.~:[iK'0l'L ...... ft::i:t JII ~fIJ • ~ ~lifilH imf'F
8 *.m/ttt<D1l'~i¥Jlilf9'E .......... lIlfjjJ* '1i.

*=.

Early jurassic plants in japan, Part 2 ..... .
· .. , . . . . . . . . .. KIMURA, T. and Tsu J II, M.
Similarities in the patterns of macro-evolution of vascular plants and vertebrates ....
................................ ASAMA, K.
Oligocene calcareous nannoplanktons in a
deep-sea core from the southern part of Kyushu-Palau ridge ................ NISHIDA, S.
Pleistocene calcareous nannoplankton biostratigraphy of the Choshi district ....... .
............................... . NISHIDA, S.
]lUtTYHl\lwr~.::::*O) ~ :/ / 1G:[i,j:§..... . 1,'1i) EB ~~ ijlt~:[ia.O)~~~~t~O).E~to)~~K~~~ ~~tI}¥~....................... JH't:fi!i-;jtwiM;R;jtwr~'::::*ilil:,*,'L.' l3'j''FU%l±. 1 wr~ 3

wr1ll! .............................. 'j'f'J'fFf................. .
· ........... TIlIlf'::::fl~· =~:§t:!tt{B • ~illi1jJt'::::lfli ~~ milll O)wr~'::::*fJJF ~ .iIiJ:{$:ffiiJ1o/J1G:[il:''0l'L .......... TIlIlf'::::fl~ • ~ttij1f • UlJ¥ fJiJ
mt\;:EB~.JJ,1G:[i{,'fI:''0l'L

Some Neogene arcid fossils from Okinawa,
Kyushu, japan .................. NODA, H.

;jtwjgWmlrll Ji'iljl1O) ,*,wrt:1E:=L - r p J~ilil:JJ, 1G:[i ..
· . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. ;R !llf5fl1*=

A new Clinocardium from the Omagari Formation of the Ombetsu Group, Kushiro coal
field, eastern Hokkaido ........ HONDA, Y.
~¥'l/~r~DO)~.~mfiDKJ:~~~~~(:fJ11!f*O):mtl~Jll1:

TUllE-· -EEB(~*· §'iIi(jz!R

Molluscan fossils from the Fujina Formation,
Shimane Prefecture, San-in disrtict, Japan........ OGASAWARA, K. and NO~IURA, R.

-EEB.::::fl[5~:i:tiJt.~ilil::f)-%!R{,'f!,jH:''0l'L ............... .
· . . . . . . . . . . . . . . . . . . . . . .. illi:i:t1WZ· f!~:i:t~j;'1i.
Cytheromorpha acupunctata (BRADY) t C.
japanica ISIlIZAKI t O)IMI{,y; ............... .

· . . . . . . . . . . . .. iU1:i:t1ilIZ· 'H'r1B'1i. • $I(lIlf:!j[Ultrastructure of the ostracod carapace, I.
General structure .............. OKADA, Y.
Ultrastructure of the ostracod carapace, II.
Reticulation .................... OKADA, Y •Fossil sclerosponges from the Ryukyu Groupof Miyako-jima and their significance as
rock builders .. MORI, K. and NAKAMORI, T.
~F~@(i1:-Ij-:/::1' Dendrophyllia '*'O)~~ • ER~Jj'fj{11:{$:ffiJll1: .......................... :kttf!f:iJilft:[ij:j[!i\!;:mli\l\fltr~;;'il t JWH~ r::J l:':f.ovt ~ iW;i1r'i-lj-:/::1'-'f 0) ~~ • i'l!lf$ 0) J:tlifj(.............. t'l EB 1rjlU!.

Mesozoic Radiolaria from the red shale in thelowest part of the Adoyama Formation,
Kuzuu, Tochigi Prefecture ............... .
, ... IGo, Hh., IGo, Hy. and NISHIMURA, H.
Early Cretaceous bivalves from the "Ubaishi
Formation", southern Kitakmi Mountains,
Japan .................... OGASAWARA, K .
A new Cretaceous pleurotomariid from Hokkaido ......................... . KAl':IE, Y.
Tfffi I3.i1!i:*'§'~mll1:'@'O)~JJ, 1G:[il:. '0l 'L (~O) 2,
Trochacea) ...................... KASE, T.
Additional ammonites of the Peroniceratinae
from the Cretaceous of Hokkaido ....... .
...... MATSUMOTO, T. and MURAMOTO, K.
A Cretaceous nautiloid from Yatsushiro Formation, Kyushu .......... MATSUMOTO, T.
Ontogenetic development and functional morphology in the early growth stages of three
Cretaceous ammonites ................... .
· .TA:"\,ABE, K., FUKUDA, Y. and OBATA, I.
Remarks on the mode of life in ammonites.................. OBATA, I., TANABE, K.,
HIRANO, H., FUKUDA, Y. and FUTAKAMI, M.
mU~tPi'~t5C~ffiJll1:;iJd?d,..t..:.:/ '" 7*['., I3:!1Uc.7:/ -'f ~ -{ ~ ~f.]0) 77' 7' ? .A O)ml:ft~l:' '0l'L ..

· ... :ffiiEB7r~· 'h'¥,1jl;~ • :fJlIlfffi-Jll1: • 3JZlIlfilLiM
N. 11lacro11lphalus <D.
O)i'i&ffiltPi'J1l[I:.'0l'L ....................... .

Nautilus p011lpilius t266
Microfossils of the lowest part of the Omi
Limestone, Niigata Prefecture, Central
Japan ............................ tl'lEBJm~*~~~ry~~QT~~~A~v71r~~~~

Coral and Fusuline faunas from the Kabin
Buri area, Southeast Thailand ........... .
........ SUGIYAMA, T. and TORIYAMA, R.
Foraminiferal biostratigraphy of the Ichinotani Formation, Hida massif, Central Japan................................ ADACHI, S.
~t¥iHl:~t:~nm I§ ~rl3l ry tt~~1tE~JeJ! ..... .

.... ~m~R· ~m~Wl· *it~T· f:tJliJ~JijiiJ

Permian bryozoans from the northeasternpart of Ellesmere Island .... SAKAGAlvIl, S.
A bryozoan species, Eridopora cf. parasitica
from the upper part of the Akasaka Limestone, and its biostratigraphic significance. . . . . . . . . . . . . . . . . . . . . . . . . . .. SAKAGAlvIl, S.
Check list and bibliography of Japanese
Cenozoic fossil Bryozoa, 1935-1978 .... ARAKAWA, S., SAKAGA1-.I1, S. and HAYAlvIl T.
tkEEFK:E~,*,f!I)Eg{*clJlij,@mvc"?t '-C

1mIEB ff-

Carboniferous trilobite palaeobiogeography ..
.......... KOBAYASHI, T. and HAMADA, T.
*:E~~J;tvC)?tj;D~tt~Ef~{tEvc "?t'-C ....... .

................................ IlIilt1*zJl;f]-Ct-o lJ, :5T~~ltB*J:: lJ W~-C~¥IH5C: t~-:>-Ct'Qo Ji:vc~WL-t.:'iWi:filllt~f!I)&~L ~ A r,*,~:fill~ i'\IfE~Fa~~t-oItQ t ~C: L--Ct'Qo ;:n~~~QK,*.~~~%~W.~E~~~*

vcfttt', u't ~U'%-C·~ c:~J::? C:~Q J&:ilk~J!GhQ ~ft8~c:~*-, B *tt~~$~lt ~eI;im:
T;gvC~ft8~'it~ P.11l Q
0,*,.~.*d~:.~~ftE~ftEM~.~~R
w~~tt~~~1iIf'9Elt20.*cvct-ot,-C:i' L- <.L-ko~K.~KA-:>-CU*~.~.~~J!k~~t'1~tt~~~1tEJ\iHlz:$lt, :ttH~if.~9:~ tfm*~A,lt/f'jjJ.x~ ~%!:c: t~-:> t.:f1.iJ' ry -r::t~ <,ttw~O).BC:~~~'9E~~Q~.~~~~Qt~~

;!; Q

0

biJ:~ltt-ot '-C ft, :!J:l<11X~1tE~1iIf9i:iJ:ftl!0)1$i.¥t
ftf~tt~~O)-tnvc7\';A, t:-C~~~h -Ct-o lJ, 1920

if.~vcgg~~gg77-t1l\'· f");)(~1I\' iJ'G *15 ~nt.:~~ ~ -:> iJ'ltlc,-t~flh~ :ttHi1lI:~,*, • tt~j1!. iJ' G~*15iJ:rrbh t.:o L-iJ' L- t~iJ: G, 'iWi~j1!. ~ t ~vc"?t'-Clt, '*'.tt;g~&llJJ!f<mf!l)O) /,f{§~WO)
1iIf9i: (1954-55) iJ::/lltW -C';!; lJ, -t~f~i'\I;gt~t,
L-i'\I;g C: ta:1J~it vC J:: -:> -C, :±. C: L- -C B*w{llUO)~~=:* ~ M~ C: ~ Q 1l'MtE ~flz:$(:f;1iIf9i:iJ: ft!f:1J(fJvcii~Gnt.:o;:nG~1iIf'9Elt,~~~:ttH*~~ ~,,:/ Ict-oItQ~1I::.E~Ff~f.!1l\t't~:t!itM,
1I::.E~§a~,

nk~,

~W

-t L- -C W.1I\'0)~7Jljvc iIIli":it'-C rrb

M~:ttHi1lI:~~EB·llJ%·~.·.llJ~%-c. 7J!..A,t..: o ;: nG~*s:!lHt, 1972 ~O) B*wfdJ¥~~=:*~:/ilI:11X~1tElc~ Q 5J'-1lfc: t~ lJ, ~ Gvc :El.if.~ B*~~:l:jHl't~:ttHiJ' G *f~J¥~-f!I)vc ~~!l~T~: Quaternary Ostracoda from

]Gsarazu near Tokyo. Trans. Proc. Palaeont.
Soc. Japan, N. S., No. 112, pp. 371-409, pIs.

~=:*~~E1I\'~%~~fE~c:*S~L-ko;:h~~49,50, 1978
*iiillijUi, T~JlR*Ji:W:}ifiJ)ll:ttHi1lI: ~ Wnx:Ji:'iWi8iJt~ry~W~Q~%~~W • • nx:~, tt.~~~~
tJlj}jg! C: ~1*li1l!vct-ot '-C fWtff Lt.: t ~ -C', 1*J~li'J;Jf£,t~b'0,*,'iWi8iJt~ lJ !\f'iWi8iJtvcbt':Q Melittosphaera
magnaporulosa 11\', Cyrtocapsella tetrapera
11\', Lychnocanium nipponicum 11\', t-o ~ u: Thecosphaera japonica 11\'~ 4 11\' -C';!;Q o ;: 0) %11\'

1*J~~Jf£t-o~~~~r.~Jf£~3W.~I*JB~.
~-C'~litvCF.a~~n L\,'Qo *~ilIijocft ="?~~~~J!GnQo -"?~tt~~~RfW~Qk~K~W~~~(lz:(fJ¥£1tiJ: &:,f L- t .nx::fill~ ~mt:J]ra~~:ttH~,*,vc~~ntdj!f*~,c:'~J:: ?vcfWtffL-;fvf;i1~ Q ~iJ: ~ t'iJ'vc "?t'-C,-"?~ ~~~ ~-t? c:

L- -Ct, Q ;: C: -C';!; lJ,~~~t.: !Ilf7Ht!~~~ 1:vc,~,

B*~eI;c:rybItB*w~J¥O)~~:ttHi1lI:~~,B[i!9c-ttf, .~~~M!JvcJ:: rytr::ti~n-Ct'k-aUJjIii~
JAi1lI:X1Jtvc fflt' ? Q W~W~~~, flh~~1tE1I\'~%c: ~1*l1*~t JI!t'*L--C,~fE L- t.: t ~-C';!;Q ;: C: iJ~~~ C: t~ -:> -C t, Q

-t5tvc~~U.:1:-C·,

0'*'.tt;g~,k~.gg77-t1lf~:/ilI:I1X~~E~1iIf~%~~~lJ~<.~~~~~~~~K.i1~J::
t, ~ ? vc, ~.i\li}jg!ft~:m:m L- -C ~FfiJ: ~ C: ~ Gn-C

9i:~~tmL-, 1976if.vc1iE\~J!f<TO)gg7J-t1l\'J:: ryt'G ftl!~-"?It:fill~~ i'\IfE~li'(Jl~t~;: C: -C';!;Q:/lltJlivc ~.if{vc :tfU~ L- ~ t..: f*7fd":-C Gn -Ct,t~t,~%~~~ P'/t-- -7' 3' ~ -It ~5tm~, § 5J'-t~ lJ vclf
R L -tnvc~":it'-C, :I:fH~rfJt~~O)i'\IfE~ rr-:>~e~:!J:l<a~w.~~WL--CU*, 1iIf9i:m.~c:
L--C, ~i'\I1iIf'9E~~c:~K, ~*~.·ew~~·~~·~~eI;.~lJB~e·~=:eO):/ilI:a~w~~ -'< JeJ! L-, :/llt1:f!I)~O).:f < BTIli*O)%ffi11\~ J:: lJ

0

0

B

267
1&1iX£a {l::fi 0) ftil:1±l-t 7.> .:. C ~ g!j G;I» I::' L "(I,' 7.>0~k, .~~B.*·~.*·~~W*K~&~,
7~-r·~£~~E·:fi~E~~~0)~~E~~~~A~·~.~·~~,e~O)~~~O)1&ft£a~ geJi!. L,.:to) -14) ft-t"C'I::' *'i5- ~h "'(\"7.>J'l9l~I!.f¥H::.::k~ < ,,*-*-t7.> O).l;..tJ: Gf,~O)-C-~~, .:to);g,~lt::k~1.,'o~;g-ft ~ GI::',.:.hGO)jqJ;g-O)liJf~$nwft,~tjllj:t:f~O) I¥~~:rL£aMO) ::k7J'-MJ:O) {:i'LJittHt

I::.~-t 7.> iailI 0) iITii\lt, C f) bft~~.*iil (Scleros-

ponges) C -t 7.>(1979) 0{I:::fili~ c.:tO))jliJi21O)~~:J:ftge~~O)WJLtJi'I::' ~::kO)]IJ~~ ~ "?

HARTMANGO) Ji!.WH::.xt L, :fi:m:£';~/{' T £,;;6' G fJJilb~ ~~~~.liIil~ *'i5--t

I::.:t-oft 7.> 1&1iX£a{l::fi~FfO) litftO)tc.ilbO) mJ!tJ:~

7.>cc~I::',.~~~,~,~llib4o/.J C .7,..7.>jJl<iJ-C·~I::' ~W~ 1m;t 7.> &:'~iJ:~~.&~~.~~~.~~.~.~~

3'f.O)~~x-'.!"JtO)£$~ ~#~-t7.>':' C 1::.tJ:0? 0~~~B*~~.~~~':'':'K~ • • ~g~,~.

O)~,~.:t? O)ge~~JtIlf'!f-t7.> ~ O)"'e~7.>o• • ~:~:fiMR~~~~~~~~~~~~m~L0:g:<E~tJ:;g,Ji!.~0)"',[)!{ilb-C

7.>,:,c~ffiI!5tL~1.,'7.>oU'LGO)lVf~lt, ~:rL£aM~jjjiJ4f::'l'fi:<fJ',~

7.>Ht1!i(ftUd4c ~:gilb7.>iJ'tJ:c, ~~htc.~l:lt
O)::kFp,,mI::'xt L ~, ~HilJ~ c tJ: ~ -C~'7.> o)lt Fi3'
it 1., ,tJ: ~'0~.llib.O)A~~~7.>:fi~~~.KxtL-C~~:9E;g-lt~~'~'L'~,,*-lt-C:t-o ~,c < I::'.:to) ~f1ifJl!t0)

v::.:t-oft7.>Jl!tt~Jl!t~. C L~ m~tJ:~:rL£aMO)liJf~

M~-" 7J =- X AI::.OOL~,:ftt*o)~~I::'lt ~~tc.

~,}i'i,iJ:~ 7.> .:. c ~rotrSi L ~1.,' 7.> 0~~~-~~~~Jir.~,~l\~:t-o~~.:tO))jliJi21.:.h~~K~.~~~OO~O)~.~~~kK

iJ'.1. b Gf,.:to)~~Ff~J:O) ;g,~v::' rPJ L ~ft,<

-ttJ:b-lQ, Acrhelia~ Galaxia ~1i*4I::' L~, .:thGO)

wall It=iX
septa ;6'G~tc.G~h7.>o)-C·lttJ:<' ~L0
septa .:to)~O)iJ: wall iJ'GM~~h7.>~O)-C·~~ ~ ~ ~ :i€l~ ~htJ:H~ll<iJiJ:~ ~ tc. o~'Etft, Gotland ,Ill,~~'L'C L~;7, '7", -7"/,~I::'/ /v'7 '" -I::.ftil:-t7.>:'l£iJ,tJ: -//v/v *cl!l'l:rL£aTltv::'~§ L, .:to)i*:ff:I5!.!iftJ: }~~--t7JI::'$7i' LtJ:;6: G fl!f
*iJ'''?~ ~ti9tJ: *f1E7JM~i¥Jiic.~ fitJ: ~ tc. o ~7.>':'c~, ~ffiltJ:j!i!8%lWJttm~;O'GillEg!jLko:rL£aTltf*O)Mt~¥£{l:ft ~;f§i!r{l: C ~~, tEl~~ ~ "?

J:Km~~~7.>,:,c~~g!jLkO)~~7.>o.:. C ~Ji!.1±l L, .:to)~~~~8':J1t~~ )\i\.7,..7.> C C~ I::', .:thGiJ:ffitEl{l::fi C L~ ~;<;b-C-~7.>ffiJ' IJ-c-tJ: <, ~~Ff~~I::' ~ --t7J'-td~t*~~ L, :Ijg~
X-'.!" JtI::.;iOOJll-c· ~ 7.> .:. C ~~illE L tc. o':'hG-j!i!O)liJf~ft, 113*0) liJf~ O):t-o < h ~1.,'
7.>S7J~M~L,~~£aO)~~.~~.~~g~.:.O)liJf~K~~,~.nw.O)*.7JM~~£.

c L~, wall O)tlll'Jl!tfWtJTiJ::ftt*1t;tGh-C1.,'tc.tJ
tJJ:~~-t7.>I::',~;g-O) ~:rL£a.~ ~'L'C Uc.

{l::fi~.nw.~O) liJf~lt,

I::',tm,l2,· 'fii: • fl\(J!~ C ~113*O)lVf~~~~-t 7.> ~7.K* 1=-~7.>':' C ~ ffi

L~1.,'7.>o ~~-C B*~~.~~lt,.Hi!l~~ ':'h~.L,-t7.> ~ o)-C·~7.>o.:. ':'I::'~.

~f~O)-~O)ge.~ Jtflf'!f268
EI*"i!l~!IWJ~~~5l11j}Cl)WffiJt~

PALAEONTOLOGICAL SOCIETY OF JAPAN, SPECIAL PAPERS, NUMBER 25:;;:- 1981 :If.~f-:f1lrr lJ: <, .f:0)m\~"%:;;:-~:t'H, ~ T. jj§~ td:J.Jli:~"i:i:;;:- ::t-;f;jt, O):hi'i. {Xo)~~f-:.g-:b-lt'"C EfJi6~H'FJit l.....
JJll:~0)~l....~¥!f:i;t '"C, T 812 fllilll~nnl~IHl'i~ij JL1+I*"¥:l'1ll"¥:l'l1l!\l.('tii,,¥:~~3Ktt, Epfs:i:!l1'.:[&J~~S<*,fljIJ%~;jffi~~~s< (rt£Z1ffl§.l'X:lIj) ~1!fCEfJl....i6Iul:'r~1,'.
(1) i:!l1'.:[&J"¥:fCImT Q ~iftj::z:l:'. 11)(::Z:O)%,ljiJlliAAf-:~ ~:b l.... v'P1~O) t 0). [iij-O);kJmI§ O)rfC;l&t;jlO)ITh1i::Z::;;:-~cot,: t 0) (17Ij;trf':/:/ ¥:;:>. '7 A O)IV;3Z:fiifij3Z:~) -C" t H'. n-:J!!J;l:.VE*~rrO)%,ljIJ%fC*H~J:f~
f:f~~T Q ::. C. *~tUf.b'r? MHfb;Y:lli~n7.>J!i6O);:b 7.>t~il"fCri • .f:o)~~fCrc.: t.:: '"C J:~CJ: IJ
t
J!:b;~ < '"C J: v'.
(2) P1~. 3Z:1i'i: c t rc -Tn-~Ni:(0)5CJit U,:lffi~'i.il:'. ~~lilIJJifi fC itZWfi l.... '"C j[~itd:J!H'l1J ~~lli '"(- 2- 7.> ~)~~fC;;0 Q ::. C. EfJi6~ c c t fc&:'flffimO)~ l.... ~tJil:lli l.... '"Cr~ v'. (ffli~ O)J:fi)g:i;nJ& l.... ~ T).
(3) l$i6fflMHil3rul:'Tb;, iXO)$~~aJl~cl..... ( J P1O)I.1~~g-:>'"Cr~1,'.
(a) 1$i6?JEd5; Jifi~Wi0tl~ t,:ri;ilW\{tJifi • i[~t'l!l=%. (*~~~ l:';:b Q ::. c J.
(b) ¥f1ff45; ~fflr3i:rml§. (;fQilR~tt~cTQ::' cJ.
(c) liJf1EP1~O)~rr. (800-1, 200 ¥l!jl~. ;fQ3Z:l:'IiJJ.
(d) P1~td:r?u:rclV;::Z:b;-I-n-~ffii:t'i'"(-;:bQ I: cO)~iEAJl. (f.li:fk91ff0)~H];0)~l....'"('t J:H.
(e) *3Z:O)~;I& (lillJJ: IJ J!i6~~~ t':fi!ijqW~l:'IV;3Z: 3< l' 7' 25 ITf.iiO)t~.g-O)t.JI:~ - kt!.l...., /q 11 - b'x.~_ r¥i*b'~i~~cTQ::'c); ~t':*3Z:~/HiS~ (8¥X;]ll?-) f':::ti'ilET"'-2-'l1lln-b;Ji:,Qc2-fi,.f:0)::t-; J: .f:O)P1ilR (*~~riMT Q/~- 12: :/ r) ; t~~· £ZO)~k 0);1& UlJIlJ: IJ Jifi~~~; ~~~AAO)

n-

t~~.

(f)

filii)' r? 0) j:p.!illl;];!~Y: lliO) J!i6O)1f~, .f: O)T1,[iifi. Y: lliiifr(.

C.f: 0) J!i6 O)niEEJj c td: Q ~m~ t,: vi.f:O)~ l.... ~i~;t '"Cr~ H.

(g) .f:O)ftfJ,~~$~.
(4) 1$i6:&Ln~~:fJEllimt7J 1980:¥ 6 fl 30 B (&:<@'). l*~fi ~~~,Ht~b:&:'~lcA':. 1..: v 7 '" ~ - c t§~O)J:~~L, 19~:¥lflo)~.~~l:' • • ~lEO)J:,EfJi61ffK@~O)TlEl:'T. k~l.....f:O)~~k~'1&rc, EfJi6:?3" c O)*lIlif~O):5ttif.~, ~~~~b'r?*co Q I: cb;;:b Qb't Ud-ltlu.
(5) J:§c (f) O)ftl!.b'GO)j:plilljflFYtRlliO)J!j6.7;.b:td:\"~i1lt, 1978 if.~O):)CillltI'fIjIT!j}]nX:~ (lliIf~rt:*
flJIT~fm!j}]~J) ~$~~\' ,t-: L i -to)'"(-, J:§c (2) O)3R{Lj:b~.7;.t,: ~n '"C\"7.>~i1I;:,O)l?-~!I~n i -t
fiifij~~5C~~ • .g-K~, W.~l:'O)~lE.~2-Q~~~<j:p~KclJ~~QT~l:'T. ::Z:$~O)~IT
MnX:~O)EfJM'vi, *~b'r?ITtd:\" (17U:¥fi 11 fl)IGcEfJ~jlif,f,tJJ), .f:0)l*~. ~~td:c~lE'1H~lillJrr.c
IJ~~~~T • .f:O) • .g-~~$~co)~*K~IJ, .f:o):¥o)~@~l:'~W~~B)~l:'K~f.li:~~if~ llitd: Ithr:f. MlM1lZ0):5tfib~,*,li::. ~ h Q I: c fr.td: -:> '"C v' ~ T.
(7) %'BIJ%O)JJll:~ft~iitrc~H::. il1i17Ij~~~c l....'"Cl'FnX:L'"Cr~\,', 1'aJjO)§Ji~;ffii~~~~rcF~'1,'i1:b-lt'"Cr~ v'. ~;p:Ji:b;b'b' Q 0)'"(-, %,))IJtd:j~i1~~~ 2-, ljIL\i'JlJfif''FJit-ltf, :$:ll11J 25 if~ ~~:?3" Ic~f4;fHl: l....
~T • .f:ht)J:fifllli}" (ml....~:?3"fCfitIJ'3[) c1,''5l:clr.td:IJ~T. v',,"?b'O)jjif\j::Z:~~co'"Cljffi-rc
TQ c 2-ICfi, iitBtA.O):hb'r?ti'i~l....'"C. WI'~J:O)1'Mt-O)td:1,'~? rc l....'"Cr~1,'. t=~lilJjJ:O)ti'i~$~b~~CA l:'2- QJ: '5. lffifr.".\O)ti:tijilif/JllJ· J:rvC-Tn-~B~c -:> '"C, fil1' f'"(-i%t~l....'"Cr~1,'.
0W

OJtllil1tiH:l~!j}]nX:~b:f~ Gnt.l:b' ..::,f-:~i1I':::ft, lli~HiJjf", 7.> ;: U:;j; Q b' t
OJJ.ll:~O)7'C:3t~JtJl-t M-:coA,@]b'G*'fitIJ B :;;:-~co Q::' Clctd: I) i

U,:,

Ln i -It ho,IT-~-----I~ 125 lill {7IJ S;
~

1m

1m

I

*

.:p :iE

1m

:!ill

f%

s

9;U

*-

~

1980ip 6 Ji 29 [I1980ip 4 Ji 29 S

III

*-

"'t-

1980ipl0Ji

1980ip 8 Ji

~t

*-

"'t-

1981ip 1 Ji

1980ipllJi--I r:i"~ 126lill {7U ~I ""I
1981ip~;i< • ip;i<~

6 Ji 29 S (S) 0)~125lill{7U;i<"Clt v:/;f- Y r].b. Igg7J-I-;I~;O)1:~Jf."'t-O)m;l:!u:: 4-1& 0) Fn9m:ik:J b~,
30C! (Ji) 1<:ltlliliffiljjH£JII:i!l!.jJ",-O)jlli~b~TI£~.:h ""(\',7.;.,6 Ji

m~i*J:u01979ip]iJ<:¥sI:li*i1*li*i0)13(:1J!J~ C 1..---c RjJ ~ .:ht-.::m£I<:~imjl" ,t-.: Vi -j (fjljJf!:;15 (t$ 1..-ilb-ltl<: J: lJ ~~\,'

t-.: Vi -It Iv),
;10

~

6 it:

O*ipl3r J: lJ :rrO)~ .t't;i<~~ O)-¥~cJ(~I<: C ~ tJ:Hi'?Jjj:b~3Cf'I; 1..- i U-.:. 1980ip13rr:PO)%fiI!O)~J<:!*li" Q F~'
0-1t, j'ftJl:'UR~lt/H1Hj[\1: (l'§lif4"'t-f!¥¥oftWlli"'t-$) 1<:t<;JliJj\" 1..- i -j • ..:c O)filiO)~.t't O)~!1iU7tm c illiK.~5t(*11t1l5~-~n,,'\) 1<:ltlJ'!:3I!i5 lJ i -It Iv.
O!lif5lIJ% No. 17 0) OYAMA, K: Revision of Matajiro Yokoyama's type Mollusca from the Terti~uy and Quaternary of the Kanto Area, 148 pp. 57 pIs. 1tU'Fip?'Gt7J.:h c tJ: I) j,l:[JjljSfI& ~b'lt--C t<;lJ i U-.:b:, iii S r~lICj:!JJ1R~.:h7.;.':' C l<:tJ: IJ i U-.: (!EfM 4700FL j3iS!- 300P,]). mAFPj6ltt#J]Ij~-O)fili0)-5§- c [j'fJ t: <t.-Jl.iIj~~htlj3~~ .t't;i<1!iiJ!§~93 • tJjOIIl '1f- (mlii'iJrIHI~JKfi'jI~~J:tL1'1'1*-"'t-JJJ!."'t-$:i!l!.'lr:t"'t-$(~)()ZSsll:J\:;: m:'1§' p lilimi/lITl19014; ~'f!lMH1-:fffilYd:sn.src;:!il1msllp lili12172) I<:t<;ll\l'l:\" L. i i". iEIl)ZSl<: J: G tJ:Hm:~Jl&)(;ltJIOj(*-"'t-ij;%illiJf~~Mill'l G~U](it~ft) t<; J: lfl'§lif4"'t-~¥oill'l7till'l C~IIH~~~~ft) -C' ~ 1&:JJk? Tn:-c---t •~ IT ~*

1 9 8 0 ip 4 Ji 25 B

I'!l

jillj

B
~ ~ ~
:t J?: JK !J!J; 1: 2-4-16

1 9 8 0 ip 4 Ji 30 S

5eD

S*"'t-;i<Jjj:f1j-!!:/!J.-P1

ISSN

~

em: '1§' P lili

0031-0204

W 117~2.000 Fl

('lit

~

.IilU

~

~

* J?:

~

~

84780 fIi)

0 3 - 8 1 5 - 1 9 0 3)

:JR J?: mtJI! .~ JK ~ ~ ~t 2 / 13"'j:VJ;j~i!I'!l.lilUi*:t;;i<:ff:

('I[

~

it.
EE
~
0 3 - 9 9 1 - 3 7 5 4)

Transactions and Proceedings of the PalaeontologicalSociety of Japan

April 30, 1980

New Series No. 117

CONTENTS
TRANSACTIONS
711. MORI, Kei: Revision of the Permian "Stromatoporoids" reported fromJapan ................................................................ 237
712. KONISHI, Kenji and MATSUDA, Shinya: Relative Fall of Sea Level within
the past 3000 Years .................................................. 243
713. OMURA, Akio: Uranium-Series Age of the Hiradoko and Uji Shell Beds,
Noto Peninsula, Central Japan ........................................ 247
714. HONDA, Yutaka: A new Chlamys from the Shitakara Formation of the
Urahoro Group, Kushiro Coal Field, eastern Hokkaido ................ 255
SHORT NOTES
17. YOSHIDA, Saburo: Eponides shiraii, new name for Eponides asanoi SHIRAI,
1960 (preoccupied) .................................................... 242
18. KOBAYASHI, Teiichi and HAMADA, Takashi: A nomenclatural note on Neo-

proetus (Paraproetus).................................................. 254
PROCEEDINGS ................................................................ 264