Where: Lincoln County, Wyoming (42.8° N, 110.9° W: paleocoordinates 34.7° N, 51.1° W)

• coordinate estimated from map

When: Twin Creek Limestone Formation, Bajocian (170.3 - 168.3 Ma)

• Lower part of formation, probably from Sliderock or Rich member.

Environment/lithology: marine; lithology not reported

Size class: macrofossils

Collected by G.R. Mansfield in 1914; reposited in the USNM

Primary reference: R. W. Imlay. 1967. Twin Creek Limestone (Jurassic) in the Western Interior of the United States. United States Geological Survey Professional Paper 540:1-105 [S. Holland/P. Monarrez]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 167144: authorized by Steven Holland, entered by Pedro Monarrez on 08.03.2015

Creative Commons license: CC BY (attribution)