south of Katsurazawa Lake (Cretaceous to of Japan)

Also known as Ikushunbetsu River

Where: Hokkaido, Japan (43.2° N, 142.5° E: paleocoordinates 48.1° N, 131.5° E)

• coordinate estimated from map

When: Kashima Formation (Yezo Group), Late/Upper Santonian to Late/Upper Santonian (85.8 - 70.6 Ma)

• Santonian-Campanian boundary interval

Environment/lithology: offshore; mudstone

• the inner-outer shelf

Size class: macrofossils

Primary reference: M. W. Caldwell, T. Konishi, I. Obata and K. Muramoto. 2008. A new species of Taniwhasaurus (Mosasauridae, Tylosaurinae) from the Upper Santonian-Lower Campanian (Upper Cretaceous) of Hokkaido, Japan. Journal of Vertebrate Paleontology 28(2):339-348 [P. Mannion/P. Mannion]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 115410: authorized by Philip Mannion, entered by Philip Mannion on 01.09.2011

Creative Commons license: CC BY (attribution)

Taxonomic list

Reptilia
 Squamata - Mosasauridae
Taniwhasaurus mikasaensis Caldwell et al. 2008 mosasaur
MCM.M10 (two large dorsal vertebrae) and MCM.A1008 (two large dorsal vertebrae, one fractured posterior caudal, two large caudals with haemapophyses) - probably two individuals