Preuss Creek, sample 1 (835 m) (Triassic of the United States)

Where: Bear Lake County, Idaho (42.5° N, 111.2° W: paleocoordinates 11.8° N, 35.1° W)

• coordinate stated in text

• small collection-level geographic resolution

When: Thaynes Formation, Spathian (251.3 - 247.2 Ma)

• "lower part of the Spathian Stage... conodont Zone 10"

• bed-level stratigraphic resolution

Environment/lithology: shallow subtidal; medium-grained, shelly/skeletal grainstone and burrowed, argillaceous siltstone

• "shallow water, subtidal calcarenites deposited in a moderate energy environment with periodic silty and shaly incursions which allowed the preservation of abundant horizontal burrows"
• "brachiopods... occur in silicified coquinas and as isolated calcareous shells. The host limestones are medium to coarse grained calcarenites with platy, argillaceous to silty interbeds bearing abundant burrows which parallel the bedding surfaces"

Size class: macrofossils

Preservation: replaced with silica

Collected in 1975

• Specimens are in the University of Alberta collections. The brachiopod collections occur through 11 m (35 ft) of strata; the lower three collections consist exclusively of the terebratulid while the upper three collections consist exclusively of the rhynchonellid.

Primary reference: D. G. Perry and B. D. E. Chatterton. 1979. Late Early Triassic brachiopod and conodont fauna, Thaynes Formation, southeastern Idaho. Journal of Paleontology 53(2):307-319 [D. Bottjer/C. Powers/J. Alroy]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 72296: authorized by John Alroy, entered by John Alroy on 30.05.2007

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Rhynchonellata
 Terebratulida - Gusarellidae
Protogusarella smithi n. gen. n. sp.
Protogusarella smithi n. gen. n. sp. Perry and Chatterton 1979
minimum count: type, 16 paratypes, and "some 100 articulated shells and dozens of silicified disarticulated valves"