Reptilia - Testudines - Protostegidae

Alternative combinations: Archelon copei, Protostega copei

Full reference: G. R. Wieland. 1909. Revision of the Protostegidae. The American Journal of Science, series 4 27(158):101-130

Belongs to Microstega according to G. E. Hooks 1998

See also Hay 1930, Wieland 1909 and Zangerl 1953

Sister taxa: none

Type specimen: YPM 1787. Its type locality is Hackberry Creek Valley, which is in a Santonian offshore horizon in the Niobrara Formation of Kansas.

Distribution: found only at Hackberry Creek Valley

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Specimen images are retrieved through the ePANDDA API.