Where: Idaho (42.1° N, 111.3° W: paleocoordinates 11.5° N, 35.3° W)

• coordinate based on nearby landmark

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

Environment/lithology: marine; lithology not reported

Size class: macrofossils

Primary reference: J. P. Smith. 1932. Lower Triassic ammonoids of North America. United States Geological Survey Professional Paper 167 [D. Bottjer/C. Powers/C. Jamet]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 33293: authorized by David Bottjer, entered by Catherine Powers on 24.07.2003, edited by Matthew Clapham

Creative Commons license: CC BY (attribution)