Plesiosauridae

Plesiosauridae Temporal range: 199–145 Ma PreЄ Є O S D C P T J K Pg N Early Jurassic - Late Jurassic

Plesiosaurus skeleton.
Scientific classification
Kingdom:	Animalia
Phylum:	Chordata
Class:	Reptilia
Superorder:	†Sauropterygia
Order:	†Plesiosauria
Superfamily:	†Plesiosauroidea
Family:	†Plesiosauridae Gray, 1825
Genera
Eretmosaurus Hydrorion Lusonectes Microcleidus Occitanosaurus Plesiopterys Plesiosaurus Seeleyosaurus Westphaliasaurus

The Plesiosauridae are a monophyletic group of plesiosaurs.

A family Plesiosauridae was first named by John Edward Gray in 1825.