Sanchu Area, Ishido Fromation, Honshu (Cretaceous of Japan)

Where: Gumma, Japan (36.3° N, 138.7° E: paleocoordinates 44.4° N, 140.8° E)

• coordinate estimated from map

• local area-level geographic resolution

When: Ishido Formation, Neocomian (145.0 - 130.0 Ma)

• Upper Neocomian

• formation-level stratigraphic resolution

Environment/lithology: marine

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 40488: authorized by Martin Aberhan, entered by Sabine Nürnberg on 24.06.2004

Creative Commons license: CC BY (attribution)

Taxonomic list

Bivalvia
 Nuculanida - Nuculanidae
Nuculana sanchuensis pointed nut clam
 Nuculida - Nuculidae
 Mytilida - Mytilidae
 Ostreida - Ostreidae
 Ostreida - Bakevelliidae
 Ostreida - Malleidae
 Ostreida - Pinnidae
Pinna (Pinna) cf. robinaldina d'Orbigny 1844 oyster
 Pectinida - Limidae
 Pectinida - Neitheoidae
Neithea (Neithea) atava Roemer 1839 scallop
syn. with N. (N.) kanmerai
Neithea (Neithella) notabilis Münster 1833 scallop
 Pectinida - Entoliidae
 Arcida - Glycymerididae
 Arcida - Parallelodontidae
 Carditida - Astartidae
 Carditida - Crassatellidae
 Hiatellida - Hiatellidae
Panopea (Myopsis) plicata Sowerby 1829 clam
 Cardiida - Cardiidae
 Trigoniida - Megatrigonioidae
 Trigoniida - Trigoniidae