Beaver Dam Mountains BM1, Bed 10 (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• coordinate based on unpublished field data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, calcareous siltstone

• Calcareous siltstone full of Permophorus and Promyalina forming shell pavement
• Bedded hard porcellaneous limestone

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 62971: authorized by Alistair McGowan, entered by Alistair McGowan on 02.08.2006

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Bivalvia
  -
Bivalvia indet.
Bivalvia indet. Linnaeus 1758 clam
Right-hand Valves Counted, 2nd Collection ABS [originally entered as "Bivalvia sp."]
 Autobranchia -
Pterioida indet.
Pterioida indet. Newell 1965 clam
Right-Hand Valves Counted. 2nd Collection ABS
 Pectinida - Aviculopectinidae
Eumorphotis multiformis
Eumorphotis multiformis Bittner 1899 scallop
 Ostreida - Bakevelliidae
Bakevellia cf. costata, Bakevellia cf. exporrecta
Bakevellia cf. costata Schlotheim 1820 oyster
Bakevellia cf. exporrecta Lepsius 1878 oyster
 Myalinida - Myalinidae
Promyalina sp., "Promyalina putiatensis" = Promyalina putiatinensis
Promyalina sp. Kittl 1903 clam
Promyalina sp. A
"Promyalina putiatensis" = Promyalina putiatinensis Kiparisova 1938 clam
Gastropoda
 Trochoidea - Colloniidae
Chartronella unicostata
Chartronella unicostata Batten and Stokes 1986 snail
2nd Collection ABS
 Caenogastropoda - Coelostylinidae
Coelostylina virginensis
Coelostylina virginensis Batten and Stokes 1986 snail
2nd Collection ABS
 Neritoidea - Naticopsidae
"Naticopsis depresispirus" = Abrekopsis depresispirus, Naticopsis utahensis
"Naticopsis depresispirus" = Abrekopsis depresispirus Batten and Stokes 1986 snail
2nd Collection ABS
Naticopsis utahensis Batten and Stokes 1986 snail
2nd Collection ABS
Rhynchonellata
 Terebratulida - Gusarellidae
Protogusarella smithi
Protogusarella smithi Perry and Chatterton 1979
 Rhynchonellida - Norellidae
Piarorhynchella triassica
Piarorhynchella triassica Girty 1927
2nd Collection ABS