Where: Japan (39.0° N, 141.5° E: paleocoordinates 18.1° N, 108.2° E)
• coordinate estimated from map
• outcrop-level geographic resolution
When: Nakadaira Formation, Sakmarian (293.5 - 290.1 Ma)
• bed-level stratigraphic resolution
Environment/lithology: marine; lithified shale
Size class: macrofossils
Primary reference: M. Ehiro. 1995. Cephalopod fauna of the Nakadaira Formation (Lower Permian) in the southern Kitakami Massif, northeast Japan. Transactions and Proceedings of the Paleontological Society of Japan, N.S. 179:184-192 [M. Clapham/M. Clapham]more details
Purpose of describing collection: taxonomic analysis
PaleoDB collection 107622: authorized by Matthew Clapham, entered by Matthew Clapham on 11.04.2011
Creative Commons license: CC BY (attribution)
Taxonomic list
| Cephalopoda | |
|
Pleuronautilus sp. von Mojsisovics 1882
Pleuronautilus yahagiensis n. sp. Ehiro 1995
Tainoceras sp. Hyatt 1883
? Foordiceras sp. Hyatt 1893 | |
|
Parastenopoceras sp. Ruzhentsev and Shimanskiy 1954
Stearoceras sp. Hyatt 1893 | |
|
Aphelaeceras cf. falciferum Yin 1933 | |
|
Agathiceras sp. Gemmellaro 1887 ammonite | |