Aso Yoshikuma coal mine, Usui-town (Eocene of Japan)

Where: Japan (33.6° N, 130.7° E: paleocoordinates 41.0° N, 124.1° E)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Oyaki Formation (Nogata Group), Lutetian (47.8 - 41.3 Ma)

• "Upper Eocene" in Kobayashi (1956) but assigned to middle Eocene (Lutetian, zone P12) on the basis of fission-track dating in Ozaki & Hamasaki, 1991.

• group of beds-level stratigraphic resolution

Environment/lithology: marine; lithified siliciclastic sediments

Size class: macrofossils

Preservation: mold/impression

Collected by H. Matsushita

• Repository: University Museum, University of Tokyo (UMUT)

Primary reference: T. Kobayashi. 1956. An interesting new form of the Aturiidae from the Paleogene of Northern Kyushu. Transactions and Proceedings of the Paleontological Society of Japan, N.S. 23:243-245 [A. Hendy/A. Hendy]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 184299: authorized by Matthew Clapham, entered by Vanessa Maciel on 14.02.2017

Creative Commons license: CC BY (attribution)

Taxonomic list

 Nautilida - Aturiidae
"Aturia" matsushitai n. sp. Kobayashi 1956 nautiloid