Toyoda Area, Higashinagano Formation, Honshu (Jurassic of Japan)

Where: Yamaguchi, Japan (34.2° N, 131.0° E: paleocoordinates 47.2° N, 139.6° E)

• coordinate estimated from map

• local area-level geographic resolution

When: Higashinagano Formation (Toyora Group), Sinemurian (199.3 - 190.8 Ma)

• formation-level stratigraphic resolution

Environment/lithology: marine; sandy shale and fine-grained sandstone

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 40560: 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
Entolium cf. calvum scallop
= Camptonectes
Entolium cf. lunare Roemer 1839 scallop
= corneolum
 Pectinida - Pectinoidae
Chlamys textoria Schlotheim 1820 scallop
 Pectinida - Limidae
"Antiquilima nagatoensis" = Antiquilima (Antiquilima) nagatoensis Hayami 1959 file clam
 Pectinida - Plicatulidae
 Pectinida - Oxytomidae
Oxytoma (Oxytoma) kobayashii Hayami 1959 scallop
"Oxytoma (Oxytoma) inequivalvis" = Oxytoma inequivalvis Sowerby 1819 scallop
Oxytoma (Palmoxytoma) cf. cygnipes Young and Bird 1822 scallop
 Ostreida - Gryphaeidae
 Ostreida - Ostreidae
 Mytilida - Mytilidae
 Carditida - Astartidae
 Carditida - Carditidae
Tutcheria itoi Hayami 1969 clam
 Carditida - Cardiniidae
 Cardiida - Cardiidae
 Lucinida - Lucinidae
 Trigoniida - Prosogyrotrigoniidae
 Protobranchia - Nuculanidae