†family Muraenosauridae White 1940 (plesiosaur)
Full reference: T. E. White. 1940. Holotype of Plesiosaurus longirostris Blake and classification of the plesiosaurs. Journal of Paleontology 14(5):451-467
Parent taxon: Plesiosauria according to T. E. White 1940
Sister taxa: Aptychodon, Embaphias, Eoplesiosaurus, Eretmosaurus, Gymocetus, Hexatarsostinus, Hunosaurus, Iserosaurus, Namuncurania, Neoplesiosauria, Nothosaurops, Orophosaurus, Plesiosauroidea, Pliosauridae, Pliosauroidea, Rhomaleosauridae, Scarrisaurus, Stratesaurus, Sulmosaurus, Taphrosaurus, Tremamesacleididae, Uronautes, Polyptychodon hudsoni, Polyptychodon interruptus
Subtaxa: none
Ecology: aquatic carnivore