Plesiosauridae

The Plesiosauridae are a monophyletic family of plesiosaurs named by John Edward Gray in 1825.^[1][2]

Plesiosaurids Temporal range: 199.6–174.7 Ma PreꞒ Ꞓ O S D C P T J K Pg N Early Jurassic - Late Cretaceous?
Plesiosaurus skeleton
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Chordata
Class:	Reptilia
Superorder:	†Sauropterygia
Order:	†Plesiosauria
Superfamily:	†Plesiosauroidea
Family:	†Plesiosauridae Gray, 1825
Genera
†Eretmosaurus †Hydrorion †Leurospondylus? †Plesiopterys †Plesiosaurus

References

• paleontology portal

1. Ketchum, H. F., and Benson, R. B. J., 2010. "Global interrelationships of Plesiosauria (Reptilia, Sauropterygia) and the pivotal role of taxon sampling in determining the outcome of phylogenetic analyses". Biological Reviews, v. 85, p. 361-392 doi:10.1111/j.1469-185X.2009.00107.x PMID 20002391
2. John Edward Gray, 1825, "A Synopsis of the Genera of Reptiles and Amphibia, with a Description of some new Species", Annals of Philosophy 10: 193–217