Beaver Dam Mountains BM1, Bed 6 (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• coordinate based on unpublished field data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, red claystone

• Red clay, well exposed. 400 cm from top. Thin calcareous shell beds with steinkerns and a Promyalina shell bed
• Bedded hard porcellaneous limestone

Size class: macrofossils

Preservation: mold/impression

Reposited in the USNM

Collection methods: surface (in situ),

Primary reference: M. Hautmann, A. B. Smith, A. J. McGowan and H. Bucher. 2013. Bivalves from the Olenekian (Early Triassic) of south-western Utah: systematics and evolutionary significance. Journal of Systematic Palaeontology 11:263-293 [M. Clapham/M. Clapham/M. Clapham]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 141586: authorized by Matthew Clapham, entered by Matthew Clapham on 29.03.2013

Creative Commons license: CC BY (attribution)

Taxonomic list

Bivalvia
 Arcida - Parallelodontidae
? Parallelodon aff. beyrichii Strombeck 1849 clam
 Myalinida - Myalinidae
Promyalina putiatinensis Kiparisova 1938 clam
 Ostreida - Bakevelliidae
Bakevellia costata Schlotheim 1820 oyster
 Cardiida - Kalenteridae
Permophorus triassicus Newell and Boyd 1999 clam
Myoconcha cf. plana Kiparisova 1938 clam
 Trigoniida - Trigonodidae
Trigonodus cf. orientalis Bittner 1899 clam