PBDB Collection

Beaver Dam Mountains BM5, Bed 11A (Triassic of the United States)

Where: Washington County, Utah (37.1° N, 113.7° W: paleocoordinates 8.0° 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• coordinate based on unpublished field data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 shale and lithified, red limestone

• Poorly exposed red shale with thin dark red bivalve limestone level

Size class: macrofossils

Preservation: mold/impression

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 62983: authorized by Alistair McGowan, entered by Alistair McGowan on 02.08.2006, edited by Matthew Clapham

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names

Tentaculita
Microconchida -	Microconchus utahensis² Microconchus utahensis² Zatoń et al. 2013
Bivalvia
-	Bivalvia indet. Bivalvia indet. Linnaeus 1758 clam 2nd Collection [originally entered as "Bivalvia sp."]
Ostreida - Bakevelliidae	Bakevellia cf. exporrecta Bakevellia cf. exporrecta Lepsius 1878 oyster 2nd Collection
Pectinida - Aviculopectinidae	Eumorphotis ? multiformis Eumorphotis ? multiformis Bittner 1899 scallop
Pectinida - Hunanopectinidae	Leptochondria "sp. a", "Leptochondria cf. thaynesiana" = Leptochondria curtocardinalis Leptochondria "sp. a" Bittner 1891 scallop 2nd Collection "Leptochondria cf. thaynesiana" = Leptochondria curtocardinalis Hall and Whitfield 1877 scallop
Myalinida - Myalinidae	? Promyalina "sp. a", ? Promyalina sp. ? Promyalina "sp. a" Kittl 1903 clam 2nd Collection ? Promyalina sp. Kittl 1903 clam Left Valves Counted, 2nd Collection
Trigoniida - Myophoriidae	Neoschizodus laevigatus¹ Neoschizodus laevigatus¹ Ziethen 1830 clam
Pholadomyida - Pholadomyidae	Arcomya sp. Arcomya sp. Agassiz 1838 clam
Cardiida - Anthracosiidae	Unionites sp. Unionites sp. Wissman 1841 clam 2nd Collection
Carditida - Myophoricardiidae	Pseudocorbula sp. Pseudocorbula sp. Philippi 1898 clam
Rhynchonellata
Terebratulida - Gusarellidae	Protogusarella smithi Protogusarella smithi Perry and Chatterton 1979 2nd Collection

¹Hautmann et al. 2013; ²Zatoń et al. 2013