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
Sister taxa: none
- 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: found only at Thalassomedon type, Pritchett (DMNH)
Specimen images are retrieved through the ePANDDA API.
Click image to enlarge. Click to access iDigBio record.