Two new species of polycotylid plesiosaurs
The second paper in the two-part report on by Albright et al. on plesiosaurs from the Upper Cretaceous Tropic Shale of southern Utah (Journal of Vertebrate Palaeontology, Volume 27(1) p. 41-58), introduces two new genera and species of polycotylid plesiosaur and contributes to the systematics of polycotylid plesiosaurs.