Red side-necked turtle

The red side-necked turtle (Rhinemys rufipes), red turtle, red-footed sideneck turtle,^[1] William's toadhead turtle, or red-footed Amazon side-necked turtle^[5] is a monotypic species of turtle in the family Chelidae. It is found in Brazil, Colombia, and possibly Peru.^[5]

Red side-necked turtle
Conservation status
Near Threatened  (IUCN 3.1)[1]
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Chordata
Class:	Reptilia
Order:	Testudines
Suborder:	Pleurodira
Family:	Chelidae
Subfamily:	Chelinae
Genus:	Rhinemys Wagler, 1830
Species:	R. rufipes
Binomial name
Rhinemys rufipes (Spix, 1824)[2]
Range
Synonyms[3][4][5]
Synonymy Emys rufipes Spix, 1824 Hydraspis rufipes Bell, 1828 Rhinemys rufipes Wagler, 1830[6] Chelys (Hydraspis) rufipes Gray, 1831 Platemys rufipes Duméril & Bibron, 1835 Phrynops rufipes Gray, 1844 Hydraspis rufipes Boulenger, 1889 Rhinemys rufipes Baur, 1893[7]

Description

In Brazil

This species is dimorphic in size meaning the sexes show different characteristics.^[8] One study found that the largest female out of a group of 24 was 256 mm in carapace length. Out of that same group, the largest male was only 199 mm in carapace length.^[8] A study focused on determining how these turtles acquire their sex discovered that it is not environmentally determined rather, it is a genetic sex determination.^[9]

Gallery

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  Male (left), female (right).