near Butte Creek (Cretaceous to of the United States)

Also known as Protostega gigas type locality

Where: Logan County, Kansas (38.8° N, 100.9° W: paleocoordinates 43.9° N, 68.7° W)

• coordinate based on nearby landmark

• small collection-level geographic resolution

When: Smoky Hill Chalk Member (Niobrara Formation), Late/Upper Coniacian to Late/Upper Coniacian (89.3 - 70.6 Ma)

Environment/lithology: marine; yellow chalk

Size class: macrofossils

Collected by Cope in 1871; reposited in the AMNH

Primary reference: E. D. Cope. 1871. [A brief account of the expedition of seventeen days, which I have just made in the valley of the Smoky Hill river in Kansas]. Proceedings of the American Philosophical Society 12(86):174-176 [M. Carrano/M. Carrano]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 203740: authorized by Evangelos Vlachos, entered by Evangelos Vlachos on 23.08.2019

Creative Commons license: CC BY (attribution)

Taxonomic list

 Testudines - Protostegidae
Protostega gigas n. gen. n. sp.
Protostega gigas n. gen. n. sp. Cope 1871 sea turtle
AMNH 1503, partial skeleton