Holotype of the polycotylid[1] plesiosaur Edgarosaurus muddi DRUCKENMILLER, 2002, (MOR 751) comprising the skull, the neck, and the left front flipper, on display in the Museum of the Rockies in Bozeman, Montana. The specimen was collected in Edgar, Carbon County, Montana, from the Shell Creek member of the Thermopolis Shale Formation, Upper Albian, uppermost Lower Cretaceous.[2]
Tim Evanson from Washington, D.C., United States of America
Notes and References
↑There is consensus in the scientific literature, that Edgarosaurus is member of the family Polycotylidae. Where this family is positioned within the Plesiosauria is, however, quite unclear. In contrast to the informations given by the author of the image, Edgarosaurus is probably not an elasmosaurid.
↑Pat S. Druckenmiller: Osteology of a new plesiosaur from the lower Cretaceous (Albian) Thermopolis Shale of Montana. Journal of Vertebrate Paleontology. 22(1):29-42, doi:10.1671/0272-4634(2002)022[0029:OOANPF]2.0.CO;2.