Hydrorion

Hydrorion (meaning 'water hunter') is a genus of plesiosaur from the Toarcian Age of the Lower Jurassic. It is only known from multiple specimens, all discovered in the Posidonia Shale of south-western Germany. The only species of Hydrorion is H. brachypterygius, which was originally described as a species of Plesiosaurus and then Microcleidus.^[1][2] It was a relatively small plesiosaur, with the largest specimen measuring 4 m (13 ft) long.^[3]

Hydrorion Temporal range: Lower Jurassic, Toarcian PreꞒ Ꞓ O S D C P T J K Pg N
Skeleton
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Chordata
Class:	Reptilia
Superorder:	†Sauropterygia
Order:	†Plesiosauria
Family:	†Microcleididae
Genus:	†Hydrorion Großmann, 2007
Type species
†Hydrorion brachypterygius (von Huene, 1923)
Synonyms
Microcleidus brachypterygius von Huene, 1923 Plesiosaurus brachypterygius (von Huene, 1923)

Restoration

See also

• Timeline of plesiosaur research