Where: Sublette County, Wyoming (42.3° N, 110.5° W: paleocoordinates 33.8° N, 50.5° W)

• coordinate estimated from map

When: Rich Member (Twin Creek Limestone Formation), Late/Upper Bajocian (171.6 - 167.7 Ma)

• Upper 30 ft of Rich Member, from 305 to 335 ft above base of formation.

Environment/lithology: marine; limestone

Size class: macrofossils

Preservation: mold/impression

Collected by R.W. Imlay in 1947; 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 167171: authorized by Steven Holland, entered by Pedro Monarrez on 08.03.2015

Creative Commons license: CC BY (attribution)