Benson, R. B. J. and Bowdler, T. 2014. Anatomy of Colymbosaurus megadeirus (Reptilia, Plesiosauria) from the Kimmeridge Clay Formation of the U.K., and High Diversity Among Late Jurassic Plesiosauroids. Journal of Vertebrate Paleontology, 34 (5), 1053-1071.