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Temporal range: Early Cretaceous
Edgarosaurus (1).jpg
Type specimen of Edgarosaurus muddi on display in the Museum of the Rockies
Scientific classification
Kingdom: Animalia
Phylum: Chordata
Class: Sauropsida
Superorder: Sauropterygia
Order: Plesiosauria
Suborder: Plesiosauroidea
Family: Polycotylidae
Genus: Edgarosaurus
Druckenmiller, 2002
Species: E. muddi
Binomial name
Edgarosaurus muddi
Druckenmiller, 2002

Edgarosaurus is a genus of polycotylid plesiosaur, containing one species, E. muddi. The type specimen was found in Early Cretaceous (late Albian) rocks in the state of Montana in the United States. At the time, this location was covered by part of the Western Interior Seaway.

See also[edit]


  • Druckenmiller, PS, 2002. "Osteology of a new plesiosaur from the lower Cretaceous (Albian) Thermopolis Shale of Montana". Journal of Vertebrate Paleontology 22: 29-42. (Abstract)