Where: Colusa County, California (39.4° N, 122.3° W: paleocoordinates 40.5° N, 82.7° W)

When: Antelope Formation, Cenomanian (100.5 - 93.9 Ma)

• Upper part of Antelope Shale, stratigraphic unit 7c of Brown and Rich (1961) and approximately 12 m below base of Venado Sandstone Member of Cortina Formation (informal). Cenomanian.

Environment/lithology: marine; pebbly mudstone

Size class: macrofossils

Collected by R. D. Brown, Jr. and E. I. Rich in 1958; reposited in the USGS

Primary reference: R. L. Squires and L. R. Saul. 2004. The pseudomelaniid gastropod Paosia from the marine Cretaceous of the Pacific Slope of North America and a review of the age and paleobiogeography of the genus. Journal of Paleontology 78(3):484-500 [J. Marcot/J. Marcot]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 220368: authorized by Jonathan Marcot, entered by Jonathan Marcot on 24.05.2021

Creative Commons license: CC BY (attribution)