Gros Ventre, WY-7 (Triassic of the United States)

Where: Montana (43.6° N, 110.7° W: paleocoordinates 13.7° N, 33.5° W)

• coordinate based on nearby landmark

• small collection-level geographic resolution

When: Dinwoody Formation, Griesbachian (252.2 - 251.3 Ma)

• bed-level stratigraphic resolution

Environment/lithology: shallow subtidal; lithified limestone

Size class: macrofossils

Preservation: mold/impression

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 44499: authorized by David Bottjer, entered by Nicole Bonuso on 13.09.2004, edited by Matthew Clapham

Creative Commons license: CC BY (attribution)

Taxonomic list

Lingulata
 Lingulida - Lingulidae
Lingularia sp. Biernat and Emig 1993
Bivalvia
  -
Bivalvia indet. Linnaeus 1758 clam
originally entered as "Bivalve indet."
 Mytilida - Mytilidae
Mytilus sp. Linnaeus 1758 mussel
 Ostreida - Pteriidae
? Pteria sp. Scopoli 1777 pearl oyster
 Pectinida - Claraiidae
? Claraia sp. Bittner 1901 scallop
 Pectinida - Aviculopectinidae
Eumorphotis sp. Bittner 1901 scallop
 Myalinida - Myalinidae
Promyalina sp. Kittl 1903 clam
? Myalina sp. de Koninck 1842 clam
"? Myalinella sp." = Myalina (Myalinella) Newell 1942 clam
 Trigoniida - Myophoriidae
Neoschizodus sp. Giebel 1855 clam