PaleoDB taxon number: 201979
Full reference: B. A. Schumacher. 2007. A new polycotylid plesiosaur (Reptilia; Sauropterygia) from the Greenhorn Limestone (Upper Cretaceous; lower upper Cenomanian), Black Hills, South Dakota. Geological Society of America Special Paper 427:133-146
Sister taxa: none
Type specimen: AMM 98.1.1, a partial skeleton (partial skull, portions of left front and rear paddles, poorly preserved vertebral column and rib portions). Its type locality is Maloney Creek (Pahasapasaurus type locality), which is in a Cenomanian marine sandstone in the Greenhorn Limestone Formation of South Dakota.
Ecology: aquatic carnivore