page_title: Rhomaleosaurus
section_title: Phylogeny
hierarchical_section_title: Rhomaleosaurus / Phylogeny
caption_attribution_description: English: Rhomaleosaurus cramptoni
context_page_description: Rhomaleosaurus is an extinct genus of Early Jurassic rhomaleosaurid pliosauroid known from Northamptonshire and from Yorkshire of the United Kingdom. It was first named by Harry Seeley in 1874 and the type species is Rhomaleosaurus cramptoni. It was one of the earliest large marine reptile predators which hunted in the seas of Mesozoic era. Its length was about 7 m long. Like other pliosaurs, Rhomaleosaurus fed on ichthyosaurs, ammonites and other plesiosaurs.
context_section_description: Smith & Dyke, 2008 redescribed the skull of R. cramptoni after its final preparation. Both Rhomaleosauridae and Pliosauridae were found to be monophyletic, and the relations between Rhomaleosaurus's species were tested. The cladogram below follows Smith & Dyke (2008), with the asterisk noting species removed from Rhomaleosaurus to their own genera since their study.
caption: CGI restoration of R. cramptoni
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