Soma Area, Nakanosawa Formation, Honshu (Jurassic of Japan)

Where: Fukushima, Japan (37.8° N, 140.9° E: paleocoordinates 45.3° N, 144.1° E)

• coordinate estimated from map

• local area-level geographic resolution

When: Nakanosawa Formation (Soma Group), Kimmeridgian (157.3 - 152.1 Ma)

• formation-level stratigraphic resolution

Environment/lithology: marine; calcareous sandstone and limestone

Size class: macrofossils

Preservation: cast, mold/impression

Primary reference: I. Hayami. 1975. A systematic survey of the Mesozoic Bivalvia from Japan. The University Museum, The University of Tokyo, Bulletin (10) [M. Aberhan/S. Nurnberg/S. Nurnberg]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 40546: authorized by Martin Aberhan, entered by Sabine N├╝rnberg on 25.06.2004

Creative Commons license: CC BY (attribution)

Taxonomic list

Bivalvia
 Arcida - Parallelodontidae
 Pectinida - Entoliidae
 Pectinida - Pectinoidae
 Pectinida - Limidae
Ctenostreon proboscideum Sowerby 1820 file clam
 Pectinida - Plicatulidae
 Ostreida - Gryphaeidae
 Ostreida - Pteriidae
Pteria masatanii pearl oyster
Pteroperna lingulata pearl oyster
 Ostreida - Bakevelliidae
 Ostreida - Pinnidae
Pinna (Pinna) cf. mitis Zieten 1830 oyster
 Mytilida - Mytilidae
Arcomytilus laitmairensis de Loriol 1883 mussel
Modiolus cf. bipartitus Sowerby 1818 mussel
 Carditida - Astartidae
 Pholadida - Corbulidae
"? Corbula globosa" = Varicorbula globosa
"? Corbula globosa" = Varicorbula globosa Sowerby 1818 clam
 Pholadida - Ceratomyidae
 Cardiida - Arcticidae
 Cardiida - Cardiidae
 Pandorida - Laternulidae
 Thraciida - Thraciidae
 Pholadomyida - Pholadomyidae
 Trigoniida - Myophorelloidae
 Trigoniida - Trigoniidae
 Protobranchia - Nuculanidae