Synonyms: Protostega dixie Zangerl 1953, Protostega potens Hay 1908
Full 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
- Protostega gigas: Its type locality is near Butte Creek, which is in a Coniacian/Campanian marine chalk in the Niobrara Formation of Kansas
- Protostega dixie: CNHM P27314, a partial skeleton. Its type locality is Moore Brothers Farm, which is in a Santonian carbonate limestone in Alabama.
- Protostega potens: AMNH 180, a partial skeleton (basioccipital and hyoplastron). Its type locality is near Elkader, which is in a Santonian/Campanian offshore chalk in the Niobrara Formation of Kansas.
Total: 3 collections each including a single occurrence
Specimen images are retrieved through the ePANDDA API.
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