Reptilia - Plesiosauria - Rhomaleosauridae
Synonym: Thaumatosauridae Romer 1956
Parent taxon: Plesiosauria according to R. B. J. Benson and P. S. Druckenmiller 2014
See also Benson et al. 2012, Ketchum and Benson 2010, Ketchum and Benson 2011, Kuhn 1966, O'Gorman 2016, O'Keefe 2001, Persson 1963, Smith 2015 and Smith and Araújo 2017
Sister taxa: Aptychodon, Aptychodon cretaceus, Bathyspondylus, Cimoliasaurus lissaensis, Cimoliasaurus teplicensis, Cimoliosaurus nazarowi, Discosaurus planior, Discosaurus vetustus, Elasmosaurus intermedius, Elasmosaurus orientalis, Embaphias, Embaphias circulosus, Eoplesiosaurus, Eretmosaurus, Gymocetus, Hexatarsostinus, Hunosaurus fasseli, Iserosaurus littoralis, Lindwurmia, Lutkesaurus, Mauisaurus brachiolatus, Megalneusaurus, Namuncurania, Neoplesiosauria, Nothosaurops, Oligosimus, Oligosimus grandaevus, Orophosaurus, Orophosaurus pauciporus, Peloneustes kanzleri, Piptomerus, Piptomerus hexagonus, Piptomerus megaloporus, Piptomerus microporus, Piratosaurus, Piratosaurus plicatus, Plesiosauriformes, Plesiosauroidea, Plesiosaurus affinis, Plesiosaurus australis, Plesiosaurus balticus, Plesiosaurus bernardi, Plesiosaurus brachistospondylus, Plesiosaurus brevifemur, Plesiosaurus brevis, Plesiosaurus continuus, Plesiosaurus cycnodeirus, Plesiosaurus degenhardti, Plesiosaurus ellipsospondylus, Plesiosaurus euryspondylus, Plesiosaurus gouldii, Plesiosaurus hexagonalis, Plesiosaurus infraplanus, Plesiosaurus latispinus, Plesiosaurus levis, Plesiosaurus lockwoodii, Plesiosaurus megapleuron, Plesiosaurus microdeirus, Plesiosaurus mudgei, Plesiosaurus neocomiensis, Plesiosaurus nordmanni, Plesiosaurus ophiodeirus, Plesiosaurus pachyomus, Plesiosaurus phillipsi, Plesiosaurus planispondylus, Plesiosaurus planus, Plesiosaurus planus trigonalis, Plesiosaurus platydeirus, Plesiosaurus poecilospondylus, Plesiosaurus shirleyensis, Plesiosaurus subdepressus, Plesiosaurus traversii, Plesiosaurus truncatus, Plesiosaurus validus, Plesiosaurus winspitensis, Pliosauroidea, Pliosaurus planus, Plistosauroidea, Polycotylus donicus, Polycotylus epigurgitis, Polycotylus orientalis, Polycotylus tenuis, Polycotylus ultimus, Polyptychodon, Polyptychodon neocomiensis, Rhaeticosaurus, Scarrisaurus, Stereosaurus cratynotus, Stereosaurus platyomus, Stereosaurus stenomus, Stratesaurus, Sulmosaurus, Taphrosaurus, Teleosaurus neogaeus, Uronautes, Uronautes cetiformis, Xenopsaria, Zahrisaurus
Subtaxa: Anningasaura Archaeonectrus Atychodracon Avalonnectes Bishanopliosaurus Borealonectes Eurycleidus Macroplata Maresaurus Meyerasaurus Rhomaleosaurus Thaumatodracon Yuzhoupliosaurus
Ecology: aquatic carnivore
Distribution:
• Jurassic of Argentina (1 collection), Canada (1: Northwest Territories), China (5), Denmark (1), Germany (1), the Russian Federation (1), the United Kingdom (15)
• Triassic of the United Kingdom (1)
Total: 26 collections including 32 occurrences