御所浦白亜紀資料館報，第21号，21–33ページ，2020年 3 月．
Bull. Goshoura Cret. Mus., No. 21, 21- 33, March, 2020.

New records for decapods from the Cretaceous Goshoura
Group (Albian to Cenomanian), Amakusa City, Kyushu,
Japan
Yusuke ANDO 1, Koji HIROSE 2, Hiroaki UGAI 2 and Kazuyoshi SHIMADA 3( 1 Mizunami Fossii Museum, 1- 47 Yamanouchi, Akeyo-cho, Mizunami City, Gifu, 509-6132, Japan. tyyu-destiny53@hotmail.co.jp）( 2 Goshoura Cretaceous Museum, 4310- 5 Goshoura, Goshoura town, Amakusa City, Kumamoto 866-0313, Japan )( 3 Goshoura town, Amakusa City, Kumamoto 866- 0313, Japan )Abstract
Three decapod species, Eryma moriedaorum Ando, Hirose, Ugai, and Shimada, new species, Hoploparia
hinokunika Ando and Shimada, new species and Bournelyreidus shiranui Ando, new species are described from the
Cenomanian Gannohana Member of the Enokuchi Formation of the Goshoura Group in the Goshoura-jima Island,
Amakusa City, western Kumamoto Prefecture. Two decapod species, H. hinokunika and Axioidea fam., gen. et sp.
indet. are described from the Cenomanian Karakizaki Formation of the Goshoura Group in the Goshoura-jima Island.
Eryma moriedaorum is characterized by a long rostrum and a very shallow branchiocardiac groove and is closest to
E. nippon Karasawa, Ohara and Kato. However, the present species differs from E. nippon in having a shallow
cervical groove and a longer rostrum. Hoploparia hinokunika is most similar to H. albertaensis Tshudy andFeldmann but differs in having cervical, hepatic, and postantennal spines. Bournelyreidus shiranui is closest to B.
oaheensis (Bishop), but differs in having a narrow front and a short rostrum.
Keywords : Erymidae, Nephropidae, Lyreididae, Late Cretaceous, Kumamoto Prefecture
Introduction
The Lower to Upper Cretaceous Goshoura Group (Albianpart of the Amakusa Islands, Kyushu, Japan (Fig. 1). Detailed

to Cenomanian) is rich in non-marine and marine fossils (e.g.,

stratigraphy and depositional facies were reported by

Matsumoto, 1938; Matsumoto and Tashiro, 1975; Komatsu

Komatsu (1999) and Komatsu and Maeda (2005); Karasawa

and Maeda, 2005; Komatsu, 2013). Although many decapod

and Komatsu (2013) summarized the geology of Goshoura

specimens have been collected from this group (Hirose andGroup. The Goshoura Group is divided into the Eboshi,

Ugai, 2012; Karasawa and Komatsu, 2013), only one species,

Enokuchi, and Karakizaki formations and the Enokuchi

Joeranina goshourajimensis Karasawa and Komatsu, 2013,

Formation is subdivided into the Hokahira and Gannohana

has been described from the Hokahira Member of themembers in ascending order (Komatsu and Maeda, 2005)

Enokuchi Formation of the Goshoura Group (Karasawa and(Fig. 2). The decapods described herein were collected from

Komatsu, 2013). In this paper, three new decapod species

the Gannohana Member of the Enokuchi Formation and theand one unnamed species are described. The described

Karakizaki Formation. The Gannohana Member consists ofspecimens are deposited in the Goshoura Cretaceous

sandstone associated with cross stratification and mudstone,

Museum (GCM-IVP).

and this member yields abundant bivalves and ammonoids
such as Graysonites adkinsi and Mariella oehlerti.

Localities and geological setting

Additionally, the member seemed to be deposited during

The Cretaceous Goshoura Group is mainly distributed in

the Cenomanian by the evidence of the ammonoids and under

Goshoura-jima and Shishi-jima islands in the southeastern

the tidal-flat, shoreface, and inner shelf environments

Yusuke Ando et al.

22

Fig. 1. Fossil localities in Goshoura-jima Island.

(Komatsu and Maeda, 2005). The Karakizaki Formationconsists of sandstone and gravelly sandstone which yield
fresh-water molluscan fossils. Therefore, Komatsu and
Maeda (2005) suggested that the formation consists of fluvial
and tidal-flat sediments.
The decapods described herein were collected from thefollowing localities (Figs. 1, 2, Table 1):
Loc. 1: Cliff of Gannohana, southeast of Goshoura-jimaIsland, Goshoura town. Fine-grained sandstone includes few
fossils of the Gannohana Member of the Enokuchi Formation.
The decapod specimens are rare in sandstones.
Loc. 2: Cliff of Gannohana, southeast of Goshoura-jimaIsland, Goshoura town. Coarse-grained sandstone includes
abundant benthic molluscs and ammonoids of theGannohana Member of the Enokuchi Formation. The
decapod specimens are common in sandstones.
Loc. 3: Roadcut of Karakizaki, west of Goshoura-jimaIsland, Goshoura town. Fine-grained sandstone includes few
fossils of the Karakizaki Formation. The decapod specimens
are rare in sandstones.

Fig. 2. Stratigraphy of the Goshoura Group modified after

Systematic Palaeontology

decapods in this study and star mark indicates horizon ofKarasawa and Komatsu (2013). Arrows indicate horizon of
decapod in Karasawa and Komatsu (2013).

Order Decapoda Latreille, 1802
Clade Erymida sensu Schram and Dixon, 2004

Genus Eryma Meyer, 1840a

Superfamily Erymoidea Van Straelen, 1925

Type species: Macrourites modestiformis von Schlotheim,

Family Erymidae Van Straelen, 1925

1822, by subsequent designation of Glaessner (1929).

New records for decapods from the Cretaceous Goshoura Group (Albian to Cenomanian), Amakusa City, Kyushu, Japan

Included species: See Schweitzer et al. (2010), Devillez etTable 1. List of fossil decapods from the present localities.

al. (2017) and Devillez and Charbonnier (2017, 2019).

Species/Locality

Eryma moriedaorum Ando, Hirose, Ugai, and Shimada,
new species

Loc. 1
2

4

Axoidea sp. indet.

(Fig. 3)
Decapoda; Hirose and Ugai, 2012, figs. 7.5, 7.6.
Material examined: GCM-IVP2789 (holotype, carapace),

Bournelyreidus shiranuiLoc. 35Eryma moriedaorum
Hoploparia hinokunika

Loc. 2

23

1
3

GCM-IVP2085 (paratype, left cheliped), GCM-IVP2733

postcervical grooves. Attachment site of mandibular muscle(paratype, carapace), GCM-IVP3044 (paratype, carapace),

triangular, well defined, swollen, smooth. Attachment site of

GCM-IVP4154 (paratype, carapace).

adductor testis muscle subrectangular, narrow, inflated.

Type locality: All specimens were collected from Loc. 2;

Postcervical groove deep, but shallow dorsally, 2 to 3 times

Gannohana Member of the Enokuchi Formation of thesinuous, joining inferior groove. Inferior groove deep,

Goshoura Group in Goshoura town, Amakusa City,

concave forward extending ventrally. Branchiocardiac

Kumamoto Prefecture. Late Cretaceous (Cenomanian).

groove very shallow, slender, not extending dorsally, curved

Etymology: This species is named for the family of late M.

forward, joining postcervical groove, becoming shallower at

Morieda, his wife F. Morieda and his son H. Morieda, whojunction with postcervical groove. Lateral margins weakly

kindly helped the authors for fieldwork in Goshoura-jimarimmed.

Island.

Pereiopod 1 of 1st cheliped belongs to claw form II of

Diagnosis: Carapace long, subcylindrical; surface covered

Devillez et al. (2016). Palm longer than high; surface covered

with tubercles. Rostrum long, slender with pointed tip.

with coarse tubercles. Fixed finger slender, 1.2 times longer

Intercalated plate narrow with short, weak ridge on medianthan palm, slightly curved dorsally; surface covered withline. Gastro-orbital groove weakly developed. Cervicalcoarse tubercles; occlusal margin not preserved. Dactylus

groove deep, sinuous, extending ventrally to join deep,

poorly preserved, as long as fixed finger, slightly curved

curved antennal groove. Hepatic groove deep, strongly

dorsally.

sinuous,grooves.

Remarks: The present species seems to be closely related to

Attachment site of mandibular muscle triangular, well

Eryma nippon Karasawa, Ohara, and Kato, 2008, describeddefined, swollen, smooth. Postcervical groove deep, sinuous,from the Lower Cretaceous (Barremian) Arida Formation ofjoining inferior groove. Inferior groove well curved forward.

Wakayama Prefecture, central Japan. However, the present

Branchiocardiac groove shallow, well curved forward,

species has a shallow cervical groove at the dorsal part of theconnection with postcervical groove. Palm longer than high;carapace and a longer rostrum. Eryma moriedaorum issurface covered with tubercles. Fixed finger slender, longer

similar to E. jungostrix Feldmann and Titus, 2006, describedthan palm. Dactylus as long as fixed finger, slightly curved

from the upper Jurassic (Oxfordian) Redwater Shale of Utah,dorsally.

U.S.A., but differs in having an inflated attachment site of

Description: Carapace subcylindrical, 2.5 times longer thanadductor testis muscle and a short antennal groove. The

high; cross section vertically oval, longer than wide; surface

present species is also similar to E. antiquum (Birshtein, 1958)

covered with coarse tubercles. Rostrum about 15% length ofdescribed from the upper Permian (Changhsingian) of Russia,

carapace, slender with pointed tip. Intercalated plate narrow,

but differs in having a short gastro-orbital groove, a strongly

short, weakly longitudinally ridge on median line. Orbital andcurved inferior groove and a shallow branchiocardiac groove.

antennal spines not preserved. Gastro-orbital groove shallow,

The present species resembles E. vocontii Devillez,

short, weakly developed, originating from median portion ofCharbonnier, Hyžný, and Leroy, 2016, described from thecervical groove. Cervical groove deep, but shallow dorsally,

Lower Cretaceous (Albian) of southeastern France, but

sinuous, extending ventrally to join antennal groove.

differs in having a shallow branchiocardiac groove and a

Antennal groove deep, slightly curved dorsally. Hepatic

strongly curved inferior groove. The present species also

groove deep, one time strongly sinuous, joining cervical andresembles E. mandelslohi (Meyer,1840b), first describedjoining

cervicalandpostcervical24

Yusuke Ando et al.

Fig. 3. Eryma moriedaorum Ando, Hirose, Ugai and Shimada, new species. 1–3, GCM-IVP2789, holotype, carapace, 1,
dorsal view; 2, left lateral view; 3, right lateral view. 4–9, GCM-IVP2733, paratype, carapace, 4, 5, dorsal view; 6, 7, left lateralview; 8, 9, right lateral view. 10, GCM-IVP3044, paratype, carapace, right lateral view. 11, GCM-IVP4154, paratype, carapace,right lateral view. 12, line drawing reconstruction of carapace. 13, GCM-IVP2085, paratype, left cheliped, left lateral view. 1–3,
5, 7, 9–11 and 13 are coated with ammonium chloride (NH4Cl). All scale bars indicate 5.0 mm. Abbreviations refer to Devillez
and Charbonnier (2019, Fig. 1A): a: branchiocardiac groove; b: antennal groove; b1: hepatic groove; c: postcervical groove; d:gastro-orbital groove; e1e: cervical groove; i: inferior groove; r: rostrum; χ: attachment site of adductor testis muscle; ω: attachment site of mandibular muscle.

New records for decapods from the Cretaceous Goshoura Group (Albian to Cenomanian), Amakusa City, Kyushu, Japan

Fig. 4. Hoploparia hinokunika Ando and Shimada, new species. 1–3, GCM-IVP4028, holotype, 1, carapace and abdomen, left lateralview; 2, carapace, left lateral view; 3, abdomen, left lateral view. 4, line drawing reconstruction of carapace. 1 and 3 are coated withammonium chloride (NH4Cl). All scale bars indicate 5.0 mm. Abbreviations refer to Feldmann et al. (1993, Fig. 3.6): A: antennal spine;a.c.: antennal carina; b: antennal groove; b’: hepatic groove; c: postcervical groove; c’: intercervical groove; c.s.: cervical spine; e:cervical groove; h: hepatic spine; i: inferior groove; p.a.: postantennal spine; s.c.: supraorbital carina; ω: prominence omega.

from the Middle Jurassic (Callovina) of Metzingen, Germany,

Included species: See Kornecki et al. (2017).

but differs in having a shallow branchiocardiac groove, along antennal groove and a slender palm of 1st cheliped.

Hoploparia hinokunika Ando and Shimada, new species

The genus has a geologic record ranging from the Late

(Fig. 4, 5)

Permian to the Early Cretaceous before this study (Glaessner,

Decapoda; Hirose and Ugai, 2012, fig. 7.7.

1969; Devillez and Charbonnier, 2017, 2019). Eryma

Material examined: GCM-IVP4208 (holotype, carapace

moriedaorum represents the first Late Cretaceous record andand abdomen), GCM-IVP1741 (paratype, right cheliped),

the youngest occurrence of the genus.

GCM-IVP1742 (paratype, right cheliped), GCM-IVP1743(paratype, carapace), GCM-IVP2003 (paratype carapace),

Infraorder Astacidea Latreille, 1802

GCM-IVP2012 (paratype, abdomen).

Section Homarida Scholtz and Richter, 1995

Type locality: GCM-IVP2012 and GCM-IVP4208 wereSuperfamily Nephropoidea Dana, 1852

collected from Loc. 1; Gannohana Member of the Enokuchi

Family Nephropidae Dana, 1852

Formation of the Goshoura Group in Goshoura town,
Amakusa City, Kumamoto Prefecture. Late Cretaceous

Genus Hoploparia McCoy, 1849

(Cenomanian).

Type species : Astacus longimanus Sowerby, 1826, by

GCM-IVP1741, GCM-IVP1742, GCM-IVP1743 and GCM-

subsequent designation of Rathbun (1926).

IVP2003 were collected from Loc. 3; Karakizaki Formation25

Yusuke Ando et al.

26

Fig. 5. Hoploparia hinokunika Ando and Shimada, new species. 1–3, GCM-IVP2003, paratype, carapace, 1, dorsal view; 2, rightlateral view; 3, left lateral view. 4, 5, GCM-IVP1743, paratype, carapace, left lateral view. 6, GCM-IVP1741, paratype, right cheliped,
right lateral view; 7, GCM-IVP1742, right cheliped, right lateral view. 8, GCM-IVP2012, paratype, abdomen, right lateral view. 1–3, 5
and 6–8 are coated with ammonium chloride (NH4Cl). All scale bars indicate 5.0 mm. Abbreviations refer to Feldmann et al. (1993, Fig.
3.6): b: antennal groove; b’: hepatic groove; c: postcervical groove; c’: intercervical groove; e: cervical groove; h: hepatic spine; p.a.:
postantennal spine; s.c.: supraorbital carina.

New records for decapods from the Cretaceous Goshoura Group (Albian to Cenomanian), Amakusa City, Kyushu, Japanof the Goshoura Group in Goshoura town, Amakusa City,
Kumamoto Prefecture. Late Cretaceous (Cenomanian).
Etymology: The trivial name is derived from “Hinokuni”,
meaning Kumamoto in an ancient age.
Diagnosis: Carapace long, subcylindrical. Supraorbital
carina weakly ridged. Rostrum slender, long. Antennal spine
long, slender, bearing well defined antennal ridge. Gastricregion not delimited. Cephalic region well delimited bycervical and antennal grooves, bearing a single postantennal
spine. Cervical groove deep, straight, starting at mid to 2/3 ofcarapace height, joining antennal and hepatic grooves.
Cervical spine weakly developed. Antennal groove shallow,

Fig. 6. Axoidea Fam., gen. et sp. indet. GCM-IVP2094, left lateralview. Scale bar indicates 5.0 mm.

short. Intercervical groove deep, curved forward without
connection with cervical groove. Postcervical groove deep,

dorsal margin with 5 to 6 spines; ventral margin smooth.

sinuous, extending ventrally to join hepatic and

Fixed finger slender, slightly curved dorsally; surface covered

intercervical grooves. Prominence omega swollen. Hepaticwith fine tubercles.

groove curved dorsally, joining antennal groove. Hepatic

Pleon poorly preserved; surface covered with fine tubercles;

spine weakly defined. Palm of 1st cheliped elongate,

dorsal margin slightly rounded; transverse groove sinuous;

longer than high; surface covered with coarse tubercles;

somites with a dorsally aligned tubercle.

dorsal margin with 5 to 6 spines; ventral margin smooth.

Remarks: The genus includes 66 species before this study

Fixed finger slender, slightly curved dorsally; surface(Kornecki et al., 2017). However, the present taxon can becovered with fine tubercles.

distinguished from these species by the characters of grooves

Description: Carapace twice longer than high, subcylin-

and antennal, postantennal and hepatic spines on the carapace,drical; surface covered with fine tubercles; weak

and is safely described as a new species (Table 2). The

median ridge behind rostral region. Rostrum poorly

present species is closest to Hoploparia albertaensis Tshudy

preserved, slender, about 15% length of carapace; tip brocken.

and Feldmann in Tshudy et al., 2005, described from theSupraorbital carina weakly ridged, extending gastric region.

Upper Cretaceous (Coniacian) Bad Heart Formation of

Antennal spine 80% as long as rostrum, slender bearing well

Alberta, Canada, by having a long antennal spine, and its

defined antennal ridge; tip pointed. Gastric region not

outline of antennal, inferior, cervical, hepatic, postcervical,

delimited. Cephalic region well delimited by the cervical andand intercervical grooves. However, the present species

antennal grooves, bearing a well-defined postantennal spine.

differs from H. albertaensis in having cervical, hepatic, andCervical region bearing a small cervical spine. Cervicalpostantennal spines. The present species seems to be related

groove well defined, deep, nearly straight, starting at mid toto H. stokesi (Weller, 1903), first described from the Upper

2/3 of carapace height, joining antennal and hepatic grooves.

Cretaceous (Campanian) of James Ross Basin of Antarctic

Antennal groove shallow, short, slightly curved dorsally.

Peninsula. Hoploparia stokesi differs from the present

Inferior groove shallow, short. Intercervical groove deep,

species in having a postorbital spine, a second intercervicalcurved forward without connection with cervical groove.

groove and a long gastro-orbital groove. Hoploparia

Postcervical groove well defined, deep, two to three times

bearpawensis Feldmann in Feldmann et al., 1977, describedslightly sinuous, obliquely extending ventrally. Prominencefrom the Upper Cretaceous (Campanian) Bearpaw Shale ofomega strongly defined, well swollen. Hepatic groove

Montana, U.S.A., seems to be similar to the new species.

shallow, strongly concave, joining antennal grooves. Hepatic

However, the present species has a hepatic spine and does not

spine developed.

have a gastrolateral spine. The present species is similar to H.

Carpus of 1st cheliped subrectangular; surface covered withtshudyi Schweitzer and Feldmann, 2001, described from thecoarse tubercles. Palm of 1st cheliped elongate, 1.5 times
longer than high; surface covered with coarse tubercles;

Cretaceous (Albian to Cenomanian) Moonshine Creek
Formation of Alaska, U.S.A., but differs in having

27

Absent

Long

AbsentPresent

Present

AbsentPresent

SwollenAbsentShort

Present

Long

AbsentConnect with b

Connect with b'

p.o.

A

g.l.

p.a.

c.s.

p.o.

h

ω

g.o.

b

i

c'

c"

b'

c

Connect with b'

Connect with b

AbsentLong

Present

Short

AbsentFlat

AbsentAbsentAbsentAbsentAbsentLong

Present

Without spine

H. albertaensis

Connect with b'

Connect with b

Present

Long

Absent

Short

Long

SwollenPresent

AbsentPresent

Present

AbsentLong

Present

With spines

H. stokesi

Connect with b'

Connect with b

AbsentShort

AbsentShort

AbsentSwollenAbsentPresent

Present

Present

Present

Lack

AbsentLack

H. bearpawensis

Connect with b'

Connect with b

AbsentShort

AbsentShort

AbsentFlat

AbsentAbsentAbsentAbsentAbsentLack

Present

Lack

H. tshudyi

Connect with b'

Connect with b

AbsentLong

AbsentLong

AbsentFlat

AbsentAbsentAbsentPresent

Present

Short

Present

Without spine

H. collingnoni

Connect with b
Connect with b'

Without connect
with b'

AbsentShort

AbsentShort

AbsentFlat

AbsentAbsentAbsentPresent

AbsentLong

Present

Lack

H. gabbi

Connect with b

AbsentShort

AbsentShort

AbsentFlat

AbsentAbsentAbsentAbsentAbsentLong

Present

Without spine

H. kamimurai

Connect with b'

Connect with b

Present

Short

AbsentLong

Long

SwollenAbsentAbsentAbsentPresent

AbsentLack

Present

Lack

H. natsumiae

spine; i: inferior groove; p.a.: postantennal spine; p.o.: postorbital spine; r: rostrum; ω: prominence omega.

antennal groove; b’: hepatic groove; c: postcervical groove; c’: intercervical groove; c”: second intercervical spine; c.s.: cervical spine; g.l.: gasrtolateral spine; g.o.: gastro-orbital groove; h: hepatic

natsumiae. The morphological characters are based on Feldmann et al. (1993) and Tshudy and Sorhannus (2003). Abbreviations refer to Feldmann et al. (1993, Fig. 3.6): A: antennal spine; b:

Table 2. Comparison of major characteristics in Hoploparia hinokunika new species, H. albertaensis, H. stokesi, H. bearpawensis, H. tsudyi, H. collingnoni, H. kaminurai, H. gabbi and H.

Without spine

H. hinokunikarCharacter/Species28
Yusuke Ando et al.

New records for decapods from the Cretaceous Goshoura Group (Albian to Cenomanian), Amakusa City, Kyushu, Japan

Fig. 7. Bournelyreidus shiranui Ando, new species. 1, GCM-IVP3184, holotype, carapace. 2–4, GCM-IVP3223, paratype,
carapace. 3, 4, expansion of front. 5, GCM-IVP2114, paratype, carapace. 6, line drawing reconstruction of carapace. 1, 2, 4 and5 are coated with ammonium chloride (NH4Cl). All scale bars indicate 5.0 mm. Abbreviations: as: anterolateral spine; if: innerfisser; ios: inner-orbital spine; k: keel; of: outer fisser; oos: outer-orbital spine; r: rostrum.

29

Yusuke Ando et al.

30

well-defined postantennal and hepatic spines. Hoploparia
hinokunika is also similar to H. collingnoni (Van Straelen,

Bournelyreidus shiranui Ando, new species

1949) which was first described from the Lower Cretaceous(Fig. 7)

(Albian) of Madagascar. However, H. hinokunika has a short

Decapoda; Hirose and Ugai, 2012, fig. 7.8.

antennal groove and a cervical spine, and the present species

Material examined : GCM-IVP3184 (holotype, carapace),does not have a postorbital spine. The present species

GCM-IVP3223(paratype, carapace), GCM-IVP2114 (para-

resembles H. kamimurai Kato and Karasawa, 2006,

type, carapace)described from the Lower Cretaceous (Barremian) Ishido

Type locality : All specimens were collected from Loc. 2;

Formation of Gunma Prefecture, central Japan, but differs in

Gannohana Member of the Enokuchi Formation of thehaving a hepatic groove which joins the cervical groove. The

Goshoura Group in Goshoura town, Amakusa City,

present species resembles H. gabbi Pilsbry, 1901, described

Kumamoto Prefecture. Late Cretaceous (Cenomanian).

from the Upper Cretaceous (Santonian to Campanian), a
Etymology:The trivial name is derived from “Shiranui”

Merchantville Formation of New Jersey and Delaware,

Japanese flame spirit (Yokai) which occurs around the

U.S.A., but differs in having hepatic, cervical and

Goshoura-jima Island. The name is an arbitrary combination

postantennal spines, and an absence of the supraorbital spines.

of letters.

The present species also resembles H. natsumiae Karasawa,

Diagnosis: Carapace ovate, longer than wide. Front narrow.

Ohara, and Kato, 2008, described from the Lower Cretaceous

Rostrum triangular. Outer-orbital spine slender, longer than(Barremian) Arida Formation of Wakayama Prefecture,

rostrum. Anterolateral margin slightly convex bearing

central Japan, but clearly differs in having a short 1st cheliped

anterolateral spines. Two pairs of anterolateral spines short,and a cervical spine, and absence of the second intercervicalslightly concave, forming 12° to 15° angle with midline ofgroove.

carapace; carapace widest at most posterior anterolateralspine. Posterolateral margin straight, then becoming slightly
Infraorder Axiidea De Saint Laurent, 1979

concave and converging posteriorly. Posterior margin weakly

Superfamily Axioidea Huxley, 1879

concave, narrow. Dorsal surface of carapace with fine
tubercles. Midline of carapace slightly keeled from rostrum to

Axoidea Fam., gen. et sp. indet.
(Fig. 6)posterior mesogastric region. Cardiac region with one pairshallow nodes.

Material examined: GCM-IVP2094 (propodus).

Descriptions: Moderate-sized raninoid, largest individual

Type locality: Loc. 3; Karakizaki Formation of thewith carapace length exceeding 20 mm. Carapace ovate in

Goshoura Group in Goshoura town, Amakusa City,

outline, greatest width about 65% carapace length. Front

Kumamoto Prefecture. Late Cretaceous (Cenomanian).

narrow, 50 to 55% of maximum carapace width. Rostrum

Remarks: A single propodus was found. The specimen istriangular, slender, slightly longer than wide, well-defined

not determined at the family, genus and species level.

rim; tip obscure. Inner-orbital spines short, nearly an isosceles
right triangular. Outer-orbital spines covered with very fine

Infraorder Brachyura Latreille, 1802

tubercles, sharp, parallel or slightly divergent anteriorly,

Superfamily Raninoidea de Haan, 1839

longer than rostrum; tip pointed. Orbits smooth concave arcs,

Family Lyreididae Guinot, 1993

interrupted by two V-shaped fissures; outer fissure deep,

Subfamily Marylyreidinae van Bakel, Guinot, Artal, Fraaije,

longer than inner fissure, subtle, at base of outer-orbital spine;

and Jagt, 2012

inner fissure deep, at base of inner-orbital spine. Anterolateral
margin slightly concave bearing two pairs anterolateral spines

Genus Bournelyreidus van Bakel, Guinot, Artal, Fraaije, andlocated at posterior end of anterolateral margin. AnterolateralJagt, 2012

spine 1.0 to 1.5 mm, slightly curved forming 12° to 15° angle

Type species: Hemioon eysunesensis Collins and Rasmussen,with midline of carapace; tip pointed; carapace widest at most

1992, by original designation.

posterior anterolateral spine. Posterolateral margin straight,

Included species: See Schweitzer et al. (2019).

then becoming slightly concave and converging posteriorly.

New records for decapods from the Cretaceous Goshoura Group (Albian to Cenomanian), Amakusa City, Kyushu, Japan

Posterior margin weakly convex, about half maximum

nov. aus dem Permo West Sibiriens. Doklady Akademii

carapace width. Dorsal surface of carapace with fineNauk, SSSR, 122, 477– 480.

tubercles.

Bishop, G.A.(1978):Two new crabs, Sodakus tatankayotankaensis

Midline of carapace slightly keeled from rostrum ton. gen., n. sp. and Raninella oaheensis n. sp. (Crustacea,

posterior mesogastric region becoming wide at anterior

Decapoda), from the Upper Cretaceous Pierremesogastric region. Cardiac and intestinal regions with low

Shale of South Dakota. Journal of Paleontology, 52,

median ridge. Cardiac region with shallow one pair node,

608– 617.

well separated from other regions, broadly swollen, flattening

Collins, J. S. H. and Wienberg-Rasmussen, H. (1992): Upper

to posterior margin.

Cretaceous–Lower Tertiary decapod crustaceans from

Remarks: The present species is closest to Bournelyreidus

West Greenland. Bulletin Grønlands Geologiske

oaheensis (Bishop, 1978) which was first described from theUndersøgelse, 162, 1– 46.

Upper Cretaceous (Campanian to Maastrichtian) Pierre Shale

Dana, J. D. (1852): Parts I and II, Crustacea. U.S. Exploringof South Dakota, U.S.A. However, B. shiranui is readily

Expedition during the Years 1838, 1839, 1840, 1841,

distinguished from B. oaheensis because the present species

1842, under the Command of Charles Wilkes, U.S.N.,

has a narrow front and a short rostrum. The new species also

13. C. Sherman. Philadelphia, p. 1–1618, 1map, sepatate

resembles B. carlilensis (Feldmann and Maxey, 1980) which

folio atlas with 96 pls.

was described from the Upper Cretaceous (Turonian) Carlile

de Haan, W. (1833–1850) : Crustacea. In P. F. von Siebold,

Shale of Kansas, U.S.A. Bournelyreidus shiranui has a long

Fauna Japonica, sive descriptio animalium, quae inouter-orbital spine, which is longer than the rostrum, and aiterne per Japoniam, jussu et auspiciis superiorum, qui

short keel on the midline of the carapace, while B. carlilensis

summum in India Batavia Imperium tenent, suscepto,

has a short outer-orbital spine which is shorter than theAnnis 1823 –1830 collegit, notis, observationibus etrostrum and a long keel which begins at the base of theadumbrationibus illustravit. i–xvii+I–xxx i+ix–xvi+1

frontal area and extends to the posterior margin. The present–243. Lugdunum, Batavorum.

species also resembles B. ericksoni Kornecki, Feldmann, andde Saint Laurent, M. (1979): Sur la classification et laSchweitzer, 2017, from the Upper Cretaceous (Maastrichtian)phylogénie des Thalassinides: definitions dela superfamille

Coon Creek Formation of Mississippi, U.S.A., but differs in

des Axioidea, de la sous-famille des Thomassiniinae

having a short keel on the midline of the carapace and a

et de deux genres nouveaux (Crustacea, Decapoda).

longer outer-orbital spine. The present species represents theComptes Rendus Hebdomadaires des Séances deoldest record of the genus.

l’Academie des Science ssérie, D288(31), 1395
–1397.

Acknowledgements

Devillez, J. and Charbonnier, S. (2017): The genus Eryma

We thank H. Kurosu (Goshoura Cretaceous Museum,Meyer, 1840 (Crustacea: Decapoda: Erymidae): newJapan) for helping with our work. We also thank late M.

synonyms, systematic and stratigraphic implications.

Morieda, F. Morieda and H. Morieda for their kind help

Bulletin de la Société Géologique de France, 188(3),during our survey in Goshoura-jima Island. We are also

10p.

much indebted to Y. Muramiya (Fukada Geological Institute,Devillez, J. and Charbonnier, S. (2019): Review of the Early

Japan) for his helpful discussions. We deeply thank Professor

and Middle Jurassic erymid lobsters (Crustacea:

Stephen K. Donovan (Naturalis Biodiversity Center, theDecapoda). Bulletin de la Société Géologique de France,

Netherlands) for reading the manuscript carefully. We are

190(1), 37p.

grateful for the review by Dr. Rodney M. Feldmann (KentState University, USA).

Devillez, J., Charbonnier, S., Hyžný, M. and Leroy, L.
(2016): Review of the Early Cretaceous erymid lobsters(Crustacea: Decapoda) from the Western Tethys.

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