Where: Japan (35.4° N, 136.6° E: paleocoordinates 21.5° N, 108.9° E)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Akasaka Formation, Wordian (266.9 - 264.3 Ma)

• group of beds-level stratigraphic resolution

Environment/lithology: lagoonal or restricted shallow subtidal; lithified, black limestone

Size class: macrofossils

Collection methods: Repository: National Museum of Nature and Science, Tsukuba (NMNS)

Primary reference: K. Asato, T. Kase, T. Ono, K. Sashida, and S. Agematsu. 2016. Nipponomaria, a new pleurotomarioidean gastropod genus (Mollusca) from the Permian Akasaka Limestone, central Japan. Paleontological Research 20:385-393 [M. Clapham/M. Clapham]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 181935: authorized by Matthew Clapham, entered by Matthew Clapham on 08.10.2016

Creative Commons license: CC BY (attribution)