Where: Hokkaido, Japan (43.2° N, 141.4° E: paleocoordinates 52.5° N, 135.4° E)

When: Trigonia inoceramid zone, Trigonia Sandstone Formation, Cenomanian (100.5 - 93.9 Ma)

Environment/lithology: marine; sandstone

Size class: macrofossils

Primary reference: T. Nagao. 1931. Two new decapod species from the upper Cretaceous deposits of Hokkaido, Japan. Journal of the Faculty of Science, Hokkaido Imperial University, Ser. 4 Geology and mineralogy 1(2):207-214 [M. Clapham/J. Fearon]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 235787: authorized by Matthew Clapham, entered by J Fearon on 01.08.2024

Creative Commons license: CC BY (attribution)