Alternative combinations: Cimoliasaurus snowii, Elasmosaurus snowii
Synonym: Alzadasaurus pembertoni Welles and Bump 1949
Full reference: S. W. Williston. 1890. Structure of the plesiosaurian skull. Science 16(405):262
- Styxosaurus snowii: KUVP 1301, a skull (a skull and 28 cervical vertebrae). Its type locality is Hell Creek, which is in a Campanian marine horizon in the Niobrara Formation of Kansas.
- Alzadasaurus pembertoni: SDSM 451, a skeleton. Its type locality is West bank of Missouri River near Bailey Island, which is in a Campanian/Campanian marine shale/shale in the Pierre Shale Formation of South Dakota.
Ecology: aquatic carnivore
• Cretaceous of United States (3: Kansas collections)
Total: 3 collections each including a single occurrence
Specimen images are retrieved through the ePANDDA API.
Click image to enlarge. Click to access iDigBio record.