Beaver Dam Mountains BM1, Bed 9 (Triassic of the United States)

Where: Washington County, Utah (37.1° N, 113.8° W: paleocoordinates 8.1° N, 39.5° W)

• coordinate based on unpublished field data

• small collection-level geographic resolution

When: Virgin Member (Moenkopi Formation), Spathian (251.3 - 247.2 Ma)

• bed-level stratigraphic resolution

Environment/lithology: lithified, yellow siltstone

• Yellowish siltstone with rich bivalve and brachiopod fauna esp. rhynchonellids some gastropods.

Size class: macrofossils

Preservation: mold/impression

Collection methods: surface (in situ),

Primary reference: A. J. McGowan, A. B. Smith, and P. D. Taylor. 2009. Faunal diversity, heterogeneity and body size in the Early Triassic: testing post-extinction paradigms in the Virgin Limestone of Utah, USA. Australian Journal of Earth Sciences 56:859-872 [A. McGowan/A. McGowan/M. Clapham]more details

Purpose of describing collection: paleoecologic analysis

PaleoDB collection 62970: authorized by Alistair McGowan, entered by Alistair McGowan on 02.08.2006, edited by Matthew Clapham

Creative Commons license: CC BY (attribution)

Taxonomic list

Rhynchonellata
 Terebratulida - Gusarellidae
Protogusarella smithi Perry and Chatterton 1979
 Rhynchonellida - Norellidae
Bivalvia
  -
Bivalvia "indet. a" Linnaeus 1758 clam
 Myalinida - Myalinidae
Promyalina putiatinensis Kiparisova 1938 clam
 Pectinida - Heteropectinidae
Eumorphotis sp. Bittner 1901 scallop
Eumorphotis ericius n. sp. Hautmann et al. 2013 scallop
 Pectinida - Hunanopectinidae
Leptochondria "sp. a", "Leptochondria cf. thaynesiana" = Leptochondria curtocardinalis
Leptochondria "sp. a" Bittner 1891 scallop
"Leptochondria cf. thaynesiana" = Leptochondria curtocardinalis Hall and Whitfield 1877 scallop
 Ostreida - Bakevelliidae
Bakevellia cf. exporrecta Lepsius 1878 oyster
Bakevellia costata Schlotheim 1820 oyster
 Pholadida - Pleuromyidae
Pleuromya prima n. sp. Hautmann et al. 2013 clam
 Cardiida - Kalenteridae
Permophorus triassicus Newell and Boyd 1999 clam
Myoconcha cf. plana Kiparisova 1938 clam
 Trigoniida - Trigonodidae
Trigonodus cf. sandbergeri von Alberti 1864 clam
Trigonodus cf. orientalis Bittner 1899 clam