†Thalassomedon hanningtoni Welles 1943 (elasmosaur)
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Reptilia - Plesiosauria - Elasmosauridae
Synonym: Alzadasaurus riggsi Welles 1943
Full reference: S. P. Welles. 1943. Elasmosaurid plesiosaurs with description of new material from California and Colorado. Memoirs of the University of California 13:125-254
Belongs to Thalassomedon according to K. Carpenter 1999
See also O'Gorman 2019, Welles 1943, Welles 1949 and Welles 1962
Sister taxa: none
Type specimens:
- Thalassomedon hanningtoni: DMNH 1588, a skeleton. Its type locality is Thalassomedon type, Pritchett (DMNH), which is in a Cenomanian marine shale/claystone in the Graneros Shale Formation of Colorado.
- Alzadasaurus riggsi: FMNH 12009, a set of postcrania (sixty vertebrae, both scapulae and both coracoids, the left paddle almost entire, the left pubis, and both ischia and ilia). Its type locality is Alzada, which is in a Cenomanian marine horizon in the Belle Fourche Formation of Montana.
Ecology: aquatic carnivore
Distribution:
• Cretaceous of United States (2: Colorado, Montana collections)
Total: 2 collections each including a single occurrence
Specimen images are retrieved through the ePANDDA API.
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