Reptilia - Sauropterygia - Pliosauridae
Alternative spellings: Pleiosaurus, Plesiosaurus (Pleiosaurus)
Invalid subtaxa: Cetiosaurus rigauxi Sauvage 1874 [nomen dubium], Ischyrodon Merian 1838, Pliosaurus portentificus Noč et al. 2004 [nomen dubium], Spondylosaurus Fischer 1845
Full reference: R. Owen. 1841. Odontography; or, A Treatise on the Comparative Anatomy of the Teeth, Their Physiological Relations, Mode of Development, and Microscopic Structure in the Vertebrate Animals. Volume I. Hippolyte Bailliere Publishers, London 1-655
Parent taxon: Thalassophonea according to R. B. J. Benson and P. S. Druckenmiller 2013
Sister taxa: Brachaucheninae, Gallardosaurus, Liopleurodon, Peloneustes, Simolestes
Subtaxa: Pleiosaurus macromerus, Pliosaurus andrewsi, Pliosaurus brachydeirus, Pliosaurus brachyspondylus, Pliosaurus funkei, Pliosaurus gamma, Pliosaurus grandis, Pliosaurus grossouvrei, Pliosaurus macromerus, Pliosaurus rossicus