Kakuma (Miocene of Japan)

Where: Toyama, Japan (36.6° N, 137.1° E: paleocoordinates 39.5° N, 134.5° E)

• coordinate estimated from map

When: Kurosedani Formation, Langhian (16.0 - 13.8 Ma)

• lowermost middle Miocene

Environment/lithology: marine; medium-grained sandstone and gray mudstone

• Turbidite deposits are exposed at this locality and consist of alternating medium-grained sandstones (about 20 cm in thickness) and dark gray mudstones (about 5 cm in thickness).

Size class: macrofossils

Primary reference: K. Amano, Y. Miyajima, Y. Nakagawa, M. Hamuro, and T. Hamuro. 2019. Chemosymbiotic Bivalves from the Lower Miocene Kurosedani Formation in Toyama Prefecture, Central Honshu, Japan. aleontological Research 23(3):208-2019 [M. Uhen/M. Uhen]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 219252: authorized by Mark Uhen, entered by Mark Uhen on 02.04.2021

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
unclassified
  -
Eocylichna sp., Eoscaphander corpulenta
Scaphopoda
 Dentaliida - Laevidentaliidae
Laevidentalium sp.
Laevidentalium sp. Cossmann 1888 tusk shell
Gastropoda
 Trochoidea - Trochidae
Protorotella depressa, Ginebis osawanoensis
 Sorbeoconcha - Naticidae
Cryptonatica sp.
Cryptonatica sp. Dall 1892 moon snail
 Thecosomata - Cavoliniidae
Bowdenatheca sp.
Bivalvia
 Nuculida - Nuculidae
"Lamellinucula hokoensis" = Nucula (Lamellinucula), Acila (Acila) submirabilis
"Lamellinucula hokoensis" = Nucula (Lamellinucula) nut clam
Acila (Acila) submirabilis Makiyama 1926 divaricate nutclam
 Solemyida - Solemyidae
Solemyidae indet.
Solemyidae indet. Adams and Adams 1857 Awning Clam
 Solemyida - Nucinellidae
Nucinella sp.
Nucinella sp. Wood 1850 Nut Clam
 Nuculanida - Malletiidae
"Bathymalletia inermis" = Malletia
"Bathymalletia inermis" = Malletia clam
 Nuculanida - Sareptidae
"Portlandia (Portlandella) lischkei" = Megayoldia (Portlandella)
"Portlandia (Portlandella) lischkei" = Megayoldia (Portlandella) clam
 Nuculanida - Tindariidae
Neilonella tsukigawaensis
 Cardiida - Tellinidae
Merisca sp.
Merisca sp. Dall 1900 tellin clam
 Cardiida - Mesodesmatidae
Donacilla sp.
Donacilla sp. Lamarck 1819 clam
 Cardiida - Mactridae
Mactra sp.
Mactra sp. Linnaeus 1767 clam
 Cardiida - Cardiliidae
Cardilia toyamaensis
 Cardiida - Vesicomyidae
Adulomya chitanii, Pliocardia kawadai
Adulomya chitanii Kanehara 1937 clam
Pliocardia kawadai Aoki 1954 clam
 Cardiida - Veneridae
"Veremolpa minoensis" = Timoclea (Veremolpa)
"Veremolpa minoensis" = Timoclea (Veremolpa) venus clam
 Poromyida - Poromyidae
Poromya osawanoensis
 Thraciida - Periplomatidae
Periploma yokoyamai
 Lucinida - Thyasiridae
Conchocele yatsuoensis n. sp.
Conchocele yatsuoensis n. sp. Amano et al. 2019 clam
 Lucinida - Lucinidae
"Lucinoma cf. acutilineatum" = Lucinoma acutilineata
"Lucinoma cf. acutilineatum" = Lucinoma acutilineata Conrad 1849 clam
 Arcida - Arcidae
Anadara sp.
Anadara sp. Gray 1847 ark
 Arcida - Limopsidae
Limopsis sp.
Limopsis sp. Sassi 1827 clam
 Pectinida - Propeamussiidae
Propeamussium sp.
Propeamussium sp. de Gregorio 1884 mud scallop
 Pectinida - Pectinoidae
Delectopecten sp.
Delectopecten sp. Stewart 1930 scallop