Bed Tim1, Webster Range (Triassic of the United States)

Where: Caribou County, Idaho (42.8° N, 111.3° W: paleocoordinates 12.1° N, 35.0° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

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

• These strata are included in the 200 m-thick A Member of the Thaynes Group (Montgomery and Cheney, 1967), which is roughly equivalent to the Lower Black Shale Member at Schmid Ridge

• bed-level stratigraphic resolution

Environment/lithology: marine; lithified shale

• Organic matter-rich, dark blue to dark brownish, very finely laminated shale

Size class: macrofossils

Collection methods: Repository: Idaho Museum of Natural History (IMNH; John A. White Paleontological Repository); UBDG (Université de Bourgogne, Géologie Dijon)

Primary reference: A. Brayard, J. F. Jenks, K. G. Bylund and The Paris Biota Team. 2019. Ammonoids and nautiloids from the earliest Spathian Paris Biota and other early Spathian localities in southeastern Idaho, USA. Geobios 54:13-36 [M. Clapham/M. Clapham/M. Clapham]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 202195: authorized by Matthew Clapham, entered by Matthew Clapham on 28.06.2019

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Cephalopoda
 Ceratitida - Columbitidae
Columbites parisianus
Columbites parisianus Hyatt and Smith 1905 ceratite
 Ceratitida - Hedenstroemiidae
Hedenstroemiidae indet.
Hedenstroemiidae indet. Waagen 1895 ceratite
 Ceratitida -
Bajarunia cf. pilata
Bajarunia cf. pilata Hyatt and Smith 1905 ceratite
 Phylloceratida - Ussuritidae
Coscaites crassus
Coscaites crassus Guex et al. 2005 ammonite
 Pseudorthocerida - Trematoceratidae
Trematoceras sp.
Trematoceras sp. Eichwald 1851