Reptilia - Sauropterygia - Elasmosauridae

Full reference: A. G. Sennikov and M. S. Arkhangelsky. 2010. On a typical Jurassic sauropterygian from the Upper Triassic of Wilczek Land (Franz Josef Land, Arctic Russia). Paleontological Journal 44(5):567-572

Parent taxon: Elasmosauridae according to A. G. Sennikov and M. S. Arkhangelsky 2010

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

Subtaxa: Alexeyisaurus karnoushenkoi

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Type: Alexeyisaurus karnoushenkoi

Ecology: aquatic carnivore