Beaver Dam Mountains BM1, Bed 18A (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• coordinate based on unpublished field data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 marl

• Terabaratulids in bioturbated greenish limestone marl

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 62977: 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
Echinoidea
  -
Echinoidea indet.
Echinoidea indet. Leske 1778 sea urchin
2nd Collection AM
 Cidaroida - Triadotiaridae
Lenticidaris sp.
Lenticidaris sp. Kier 1968 pencil urchin
Tentaculita
 Microconchida -
Microconchus utahensis2
Microconchus utahensis2 Zatoń et al. 2013
Rhynchonellata
 Rhynchonellida -
Rhynchonellida indet.
Rhynchonellida indet. Kuhn 1949
2nd Collection AM
 Rhynchonellida - Norellidae
Piarorhynchella triassica
 Terebratulida - Gusarellidae
Protogusarella smithi
Protogusarella smithi Perry and Chatterton 1979
Gastropoda
  -
Gastropoda indet.
Gastropoda indet. Cuvier 1795 snail
2nd Collection [originally entered as "Gastropoda sp."]
 Neritoidea - Naticopsidae
Naticopsis depressispira, Naticopsis sp.
Naticopsis depressispira snail
2nd Collection AM
Naticopsis sp. M'Coy 1844 snail
 Caenogastropoda - Coelostylinidae
? Coelostylina sp.
? Coelostylina sp. Kittl 1894 snail
2nd Collection AM
Bivalvia
  -
Bivalvia indet.
Bivalvia indet. Linnaeus 1758 clam
Right Valves Counted, 2nd Collection
 Myalinida - Myalinidae
Promyalina "sp. a", Promyalina "sp. b", "Promyalina putiatensis" = Promyalina putiatinensis
Promyalina "sp. a" Kittl 1903 clam
Promyalina "sp. b" Kittl 1903 clam
"Promyalina putiatensis" = Promyalina putiatinensis Kiparisova 1938 clam
 Pectinida - Aviculopectinidae
Eumorphotis ericius1
Eumorphotis ericius1 Hautmann et al. 2013 scallop
2nd Collection (12)
 Pectinida - Hunanopectinidae
Leptochondria "sp. b", Leptochondria "sp. a", Leptochondria sp., "Leptochondria cf. thaynesiana" = Leptochondria curtocardinalis
Leptochondria "sp. b" Bittner 1891 scallop
Right Valves Counted
Leptochondria "sp. a" Bittner 1891 scallop
Left Valves Counted
Leptochondria sp. Bittner 1891 scallop
Left Valves Counted
"Leptochondria cf. thaynesiana" = Leptochondria curtocardinalis Hall and Whitfield 1877 scallop
 Ostreida - Bakevelliidae
Bakevellia sp.
Bakevellia sp. King 1848 oyster
Right Valves Counted
 Cardiida - Anthracosiidae
Unionites sp., Unionites cf. canalensis
Unionites sp. Wissman 1841 clam
Left Valves Counted, 2nd Collection (1)
Unionites cf. canalensis Catullo 1847 clam
 Carditida - Myophoricardiidae
Pseudocorbula sp.
Pseudocorbula sp. Philippi 1898 clam
 Trigoniida - Myophoriidae
Myophoria sp., Neoschizodus laevigatus
Myophoria sp. Bronn 1834 clam
2nd Collection AM
Neoschizodus laevigatus Ziethen 1830 clam
1Hautmann et al. 2013; 2Zatoń et al. 2013