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 Nürnberg on 25.06.2004
Creative Commons license: CC BY (attribution)
Taxonomic list
| Bivalvia | |
|
Nuculana (Dacryomya) toriyamae pointed nut clam | |
|
Cardinia orientalis clam
Cardinia toriyamai Hayami 1958 clam | |
|
Tutcheria itoi Hayami 1969 clam | |
|
? Cardium naganoense cockle | |
|
Luciniola hasei clam
Sphaeriola nipponica clam | |
|
Modiolus magatama mussel | |
|
Liostrea toyorensis oyster | |
|
Plicatula praenipponica scallop
Plicatula subcircularis scallop | |
Oxytoma (Palmoxytoma) cf. cygnipes, "Oxytoma (Oxytoma) inequivalvis" = Oxytoma inequivalvis, Oxytoma (Oxytoma) kobayashii, Meleagrinella japonica
Oxytoma (Palmoxytoma) cf. cygnipes Young and Bird 1822 scallop
"Oxytoma (Oxytoma) inequivalvis" = Oxytoma inequivalvis Sowerby 1819 scallop
Oxytoma (Oxytoma) kobayashii Hayami 1959 scallop
Meleagrinella japonica scallop | |
Plagiostoma kobayashii, Plagiostoma matsumotoi, "Antiquilima nagatoensis" = Antiquilima (Antiquilima) nagatoensis, Ctenostreon japonicum
Plagiostoma kobayashii file clam
Plagiostoma matsumotoi file clam
"Antiquilima nagatoensis" = Antiquilima (Antiquilima) nagatoensis Hayami 1959 file clam
Ctenostreon japonicum file clam | |
|
? Aequipecten toyorensis scallop
Chlamys textoria Schlotheim 1820 scallop | |
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