USGS 9384, south bank of Yukon River (Triassic of the United States)

Where: Alaska (65.2° N, 141.7° W: paleocoordinates 39.8° N, 43.6° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Julian (235.0 - 232.0 Ma)

Environment/lithology: lithified limestone

Size class: macrofossils

Collected by Eliot Blackwelder; reposited in the USNM

Primary reference: J. P. Smith. 1927. Upper Triassic marine invertebrate faunas of North America. United States Geological Survey Professional Paper 141:1-262 [D. Bottjer/C. Powers/M. Clapham]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 144378: authorized by Matthew Clapham, entered by Matthew Clapham on 06.05.2013, edited by Catherine Powers

Creative Commons license: CC BY (attribution)

Taxonomic list

 Terebratulida - Dielasmatidae
"Dielasma" chapini n. sp. Smith 1927
 Pectinida - Entoliidae
Pecten (Entolium) yukonensis n. sp. Smith 1927 scallop
 Pectinida - Limidae
Lima martini n. sp.
Lima martini n. sp. Smith 1927 file clam
 Cardiida - Kalenteridae
"Pleurophorus" overbecki n. sp. Smith 1927 clam
 Nautilida - Tainoceratidae
Germanonautilus brooksi n. sp. Smith 1927 nautiloid