The Plesiosauria (/ˌpliːsiəˈsɔːriə, -zi-/ PLEE-see-ə-SOR-ee-ə, -⁠zee-; Greek: πλησίος, plesios, meaning "near to" and sauros, meaning "lizard") or plesiosaurs...

two pairs of large, elongated paddles. It lends its name to the order Plesiosauria, of which it is an early, but fairly typical member. It contains only...

is more closely related to Plesiosauria than to Nothosaurus. Pistosaurus is often mistaken with Nothosaurus and Plesiosauria. Nothosaurus belongs to the...

originally included only members of the family Pliosauridae, of the order Plesiosauria, but several other genera and families are now also included, the number...

Ketchum, H.F.; Benson, R.B.J. (2010). "Global interrelationships of Plesiosauria (Reptilia, Sauropterygia) and the pivotal role of taxon sampling in determining...

extinction and flourished during the Triassic before all except for the Plesiosauria became extinct at the end of that period. The plesiosaurs would continue...

Sachs, S. (2005). "Redescription of Elasmosaurus platyurus, Cope 1868 (Plesiosauria: Elasmosauridae) from the Upper Cretaceous (lower Campanian) of Kansas...

Everhart, Michael J. (2022). "Washed Ashore – New Elasmosaurid Specimens (Plesiosauria: Sauropterygia) from the Late Cretaceous of Colorado and Kansas and Their...

Plesiosauroidea (Reptilia) and a review of the phylogeny and classification of the Plesiosauria". Bulletin of the British Museum (Natural History) Geology. 35 (4): 253–347...

The Allen Formation is a geological formation in Argentina whose strata date back to the Late Cretaceous (middle Campanian to early Maastrichtian. Dinosaur...