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Journal of Paleontology

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A NEW POLYCOTYLID PLESIOSAUR (REPTILIA: SAUROPTERYGIA) FROM THE UPPER CRETACEOUS BEARPAW FORMATION IN SASKATCHEWAN, CANADA

¹ Department of Geology and Geophysics, University of Calgary, 2500 University Drive NW, Calgary, Alberta T2N 1N4, Canada, and Royal Tyrrell Museum of Palaeontology, PO Box 7500, Drumheller, Alberta T0J 0Y0, Canada

A new species of polycotylid, Dolichorhynchops herschelensis, is described based on a well-preserved skeleton from the Upper Cretaceous (Campanian–Maastrichtian) Bearpaw Formation of Herschel, Saskatchewan. Its small size as an adult, the sharp rise in front of the parietal crest, and the straight ilium with narrow dorsal end are diagnostic features of this taxon. This is the first polycotylid plesiosaur described from the Bearpaw Formation, deposited during the critical period when polycotylids were disappearing from the Western Interior of North America.

This article has been cited by other articles:

				B. A. Schumacher A new polycotylid plesiosaur (Reptilia; Sauropterygia) from the Greenhorn Limestone (Upper Cretaceous; lower upper Cenomanian), Black Hills, South Dakota Geological Society of America Special Papers, January 1, 2007; 427(0): 133 - 146. [Abstract] [Full Text] [PDF]