Where: Montana (44.8° N, 112.3° W: paleocoordinates 15.2° N, 33.9° W)

• coordinate based on nearby landmark

• small collection-level geographic resolution

When: Dinwoody Formation, Griesbachian (252.3 - 251.3 Ma)

• group of beds-level stratigraphic resolution

Environment/lithology: shallow subtidal; limestone

Size class: macrofossils

Primary reference: M. Fraiser. 2005. When Bivalves Took Over the World: Global Paleoecology of Bivalves During the Aftermath of the End-Permian Mass Extinction. [D. Bottjer/N. Bonuso/N. Bonuso] more details

Purpose of describing collection: paleoecologic analysis

PaleoDB collection 44491: authorized by David Bottjer, entered by Nicole Bonuso on 13.09.2004, edited by Wolfgang Kiessling