Bed SC20, South Canyon, New Pass Range (Triassic of the United States)

Where: Nevada (39.6° N, 117.5° W: paleocoordinates 8.6° N, 43.4° W)

• coordinate stated in text

• outcrop-level geographic resolution

When: Augusta Formation (Star Peak Group), Longobardian (242.0 - 235.0 Ma)

• Sutherlandi zone or lower

• group of beds-level stratigraphic resolution

Environment/lithology: reef, buildup or bioherm; lithified, medium-grained, gray limestone

• Biostromes of in situ corals, hydrozoans, mollusks, and calcareous red algae occur at the base of a 59 m thick carbonate and argillaceous limestone interval. Biostromes ranging in thickness from one to three meters.

Size class: macrofossils

Preservation: recrystallized, replaced with calcite

Collected by G.D. Stanley

Collection methods: peel or thin section,

• Repository: University of Montana Invertebrate Paleontology, University of Montana Paleontology Center

Primary reference: E. Roniewicz and G. D. Stanley. 1998. Middle Triassic cnidarians from the New Pass Range, central Nevada. Journal of Paleontology 72(2):246-256 [W. Kiessling/B. Brenneis/M. Clapham]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 42552: authorized by Wolfgang Kiessling, entered by Benjamin Brenneis on 02.08.2004, edited by Wolfgang Kiessling

Creative Commons license: CC BY (attribution)

Taxonomic list

Hydrozoa
 Lemniscaterina - Cassianastraeidae
Anthozoa
 Scleractinia - Pamiroseriidae
Ceriostella variabilis Roniewicz and Stanley 1998 stony coral
Bivalvia
 Ostreida - Pinnidae
Atrina sinuta n. sp. oyster
 Ostreida - Gryphaeidae
? Liostrea jungi n. sp. oyster
 Pectinida - Pectinoidae
Nevadapecten lynnae n. gen. n. sp., Pleuronectites newelli n. sp., Loxochlamys corallina n. gen. n. sp.
Nevadapecten lynnae n. gen. n. sp. Waller and Stanley 2005 scallop
Pleuronectites newelli n. sp. Waller 2005 scallop
Loxochlamys corallina n. gen. n. sp. Waller and Stanley 2005 scallop
 Pectinida - Oxytomidae
Oxytoma (Oxytoma) grantsvillensis n. sp. Waller 2005 scallop
 Pectinida - Hunanopectinidae
Asoella "sp. a" Tokuyama 1959 scallop
Asoella "sp. b" Tokuyama 1959 scallop
Asoella "sp. c" Tokuyama 1959 scallop
 Pectinida - Anomiidae
"Pseudoplacunopsis aff. fissistriata" = Placunopsis fissistriata
"Pseudoplacunopsis aff. fissistriata" = Placunopsis fissistriata Winckler 1861 scallop
 Pectinida - Limidae
Antiquilima ladinica n. sp. file clam
Plagiostoma acutum n. sp. file clam
 Myalinida - Mysidiellidae
Promysidiella planirecta n. sp. Waller and Stanley 2005 clam
Promysidiella desatoyensis n. sp. Waller and Stanley 2005 clam