Hydromedusa

Hydromedusa; Temporal range: Paleocene-Recent; ~62–0 Ma PreꞒ Ꞓ O S D C P T J K Pg N
	Argentine snake-necked turtle,; Hydromedusa tectifera
Scientific classification
Kingdom:	Animalia
Phylum:	Chordata
Class:	Reptilia
Order:	Testudines
Suborder:	Pleurodira
Family:	Chelidae
Subfamily:	Hydromedusinae
Genus:	Hydromedusa; Wagler 1830
Species
	†H. casamayorensis De la Fuente & Bona 2002; H. maximiliani Mikan 1820; H. tectifera Cope 1869;

Hydromedusa is a turtle genus in the family Chelidae, commonly known as the South American snake-necked turtles. They are quite closely related to the South American side-necked swamp turtles (Acanthochelys) and the snake-necked turtles of the Australian-Melanesian region (Chelodina), but less closely to the spine-necked river turtles of South America (Podocnemididae) which belong to a more modern lineage of Pleurodira.

For the hydrozoan Cnidaria called "Hydromedusa" or "Hydromedusae", see Anthomedusae.

Species

This genus contains the following extant and fossil species:

Brazilian snake-necked turtle, Cágado da Serra, Hydromedusa maximiliani
Argentine snake-necked turtle, Cágado pescoço de cobra, Hydromedusa tectifera
Hydromedusa casamayorensis De la Fuente & Bona 2002, Salamanca and Sarmiento Formations, Argentina

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