East of Little America (Eocene of the United States)

Where: Sweetwater County, Wyoming (41.5° N, 109.8° W: paleocoordinates 45.5° N, 96.0° W)

• coordinate stated in text

• small collection-level geographic resolution

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

• single specimen; unit or level within the Bridger not indicated

• bed-level stratigraphic resolution

Environment/lithology: mire or swamp; gray claystone

• specimen "probably sank into a deep, soft swamp mud... marsh deposites" near "channel fills"
• "gray clay"

Size class: macrofossils

Collection methods: surface (in situ),

Primary reference: R. Zangerl. 1944. Aspideretes annae n. sp., a new species of soft shell turtle from the Bridger Eocene of Wyoming. American Midland Naturalist 31(3):583-591 [J. Alroy/J. Alroy/J. Alroy]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 27382: authorized by John Alroy, entered by John Alroy on 04.12.2002

Creative Commons license: CC BY (attribution)

Taxonomic list

Reptilia
 Testudines - Trionychidae
"Aspideretes annae n. sp." = Trionyx ellipticus
"Aspideretes annae n. sp." = Trionyx ellipticus Hay 1908 softshell turtle