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)

• Middle Member. Presence of C. gifuensis (=Gifuella gifuensis) suggests correlation with Neoschwagerina haydeni subzone, in the upper part of the Neoschwagerina-Verbeekina zone at Akasaka.

• group of beds-level stratigraphic resolution

Environment/lithology: lithified, black, carbonaceous limestone

Size class: macrofossils

Collection methods: chemical,

• Processed using a 5% formic acid solution

Primary reference: H. Yamagishi and T. Fujimoto. 2011. Chondrichthyan remains from the Akasaka limestone formation (Middle Permian) of Gifu Prefecture, central Japan. Bulletin of the Kanagawa Prefectural Museum (Natural Sciences) 40:1-6 [M. Clapham/M. Clapham/M. Clapham]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 117864: authorized by Matthew Clapham, entered by Matthew Clapham on 28.09.2011

Creative Commons license: CC BY (attribution)