AMNH B6951, Twin Creek, Fremont County (Permian of the United States)

Where: Wyoming (42.6° N, 108.6° W: paleocoordinates 13.7° N, 30.3° W)

• coordinate estimated from map

• small collection-level geographic resolution

When: Grandeur Member (Park City Formation), Kungurian (279.3 - 272.3 Ma)

• Upper Leonardian

• bed-level stratigraphic resolution

Environment/lithology: marine; limestone

• Coarsely Crystalline Limestone. Recrystallized from a grainy limestone.

Preservation: replaced with silica

Reposited in the AMNH

• U. Wyoming Museum for gastropods

Primary reference: N. D. Newell and D.W. Boyd. 1995. Pectinoid bivalves of the Permian-Triassic crisis. Bulletin of the American Museum of Natural History 227:1-95 [D. Bottjer/M. Clapham/M. Clapham]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 61953: authorized by Pete Wagner, entered by Pete Wagner on 08.07.2006

Creative Commons license: CC BY (attribution)

Taxonomic list

Gastropoda
 Bellerophontida - Euphemitidae
Euphemites sparciliratus Yochelson 1960 snail
Warthia fissus Yochelson 1960 snail
 Bellerophontida - Bellerophontidae
Retispira modesta Girty 1909 snail