Wikipedia
Pahasapasaurus
Pahasapasaurus is a genus of plesiosaur. It was an early polycotylid plesiosaur from the Cenomanian of South Dakota, USA. Distinctive features of the taxon include elongate epipodial bones ( radius/ ulna - tibia/ fibula) and the nature of the palate bones (roof of the mouth). The type species is P. haasi.