Gillette, D.D.; and Titus, A.L. Plesiosaurs from the Upper Cretaceous (Cenomanian-Turonian) Tropic Shale of southern Utah, Part 2: Polycotylidae. Journal
Boyd, Clint A.; Mazuch, Martin. A basal ornithopod dinosaur from the Cenomanian of the Czech Republic. Journal of Systematic Palaeontology. 2017, 16 (11):
Gillette, D.D.; and Titus, A.L. Plesiosaurs from the Upper Cretaceous (Cenomanian-Turonian) Tropic Shale of southern Utah, Part 2: Polycotylidae. Journal