Opal [USGS] (Eocene of the United States)

Where: Wyoming (41.8° N, 110.3° W: paleocoordinates 45.8° N, 96.5° W)

• coordinate based on political unit

• small collection-level geographic resolution

When: Bridger Formation, Bridgerian (50.3 - 46.2 Ma)

• lowest of the Bridger formation

Environment/lithology: terrestrial; lithology not reported

Size class: macrofossils

Collected by Dr W. D. Matthew and Mr Walter Granger in 1902

Collection methods: surface (float), surface (in situ)

Primary reference: O. P. Hay. 1908. The fossil turtles of North America. Carnegie Institution of Washington Publication 75:1-568 [M. Carrano/M. Carrano/M. Carrano]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 131939: authorized by Roger Benson, entered by Roger Benson on 02.08.2012

Creative Commons license: CC BY (attribution)

Taxonomic list

 Testudines - Trionychidae
"Amyda aequa n. sp." = Trionyx aequa
"Amyda aequa n. sp." = Trionyx aequa Hay 1908 softshell turtle
two nearly complete carapaces of a trionychid