Hydromedusa
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.
| Hydromedusa Temporal range: Paleocene-Recent ~  | |
|---|---|
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| 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 | |
  | |
Species
    
This genus contains the following extant[1] 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
 
| Wikimedia Commons has media related to Hydromedusa. | 
References
    
- Gaffney, E. S. (May 10, 1977). "The side-necked turtle family Chelidae : a theory of relationships using shared derived characters. American Museum novitates ; no. 2620". Novitates. 2620. Retrieved 13 April 2022.
 
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