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)
Taxonomic list
Chondrichthyes | |
Lissodus sp. Brough 1935 elasmobranch | |
Glikmanius occidentalis Leidy 1859 elasmobranch |