Vertebrata - Sauropterygia - Elasmosauridae

Parent taxon: Elasmosauridae according to J. J. Sepkoski 2002

Sister taxa: Albertonectes, Alexeyisaurus, Alzadasaurinae, Aristonectinae, Callawayasaurus, Callowayosaurus, Cimoliasaurus, Elasmosaurinae, Elasmosaurus, Eromangasaurus, Gronausaurus, Hydralmosaurus, Hydrotherosaurus, Libonectes, Mauisaurus, Scanisaurus, Stereosaurus, Styxosaurus, Terminonatator, Thalassiosaurus, Thalassomedon, Thalassonomosaurus, Tuarangisaurus, Wapuskanectes, Zarafasaura, Morturneria

Subtaxa: Leurospondylus ultimus

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Ecology: aquatic carnivore