Nazas slider

Nazas slider
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Chordata
Class:	Reptilia
Order:	Testudines
Suborder:	Cryptodira
Superfamily:	Testudinoidea
Family:	Emydidae
Genus:	Trachemys
Species:	T. hartwegi
Binomial name
	Trachemys hartwegi; (Legler, 1990)
Synonyms
	Nota bene: Dashes indicate scientific names which are simply new combinations, i.e., not new taxa. Pseudemys scripta hartwegi ; Legler, 1980 (nomen nudum); Chrysemys scripta hartwegi ; — Obst, 1983; Trachemys scripta hartwegi ; — Iverson, 1985; Pseudemys scripta hartwegi ; Legler, 1990; Trachemys scripta hartwegi ; — Iverson, 1992; Trachemys ornata hartwegi ; — Walls, 1996; Trachemys nebulosa hartwegi ; — Bringsøe, 2001; Trachemys gaigeae hartwegi ; — Seidel, 2002;

The Nazas slider (Trachemys hartwegi) is a species of turtle in the family Emydidae. It is endemic to northern Mexico.[1]

Taxonomy

It was formerly considered a subspecies of the Big Bend slider (T. gaigeae), but in 2021 it was reclassified as a distinct species by the Turtle Taxonomy Working Group and the Reptile Database.[2] Both hartwegi and gaigeae may have originally evolved in endorheic basins until their respective basins were captured by the Pecos-Grande system.[3]

Distribution

It is endemic to Mexico, where it is only found in the main channel of the Nazas River in northeastern Durango and southwestern Coahuila.[1]

Status

Although presently considered conspecific with T. gaigeae on the IUCN Red List, with T. gaigeae as a whole classified as Vulnerable, T. hartwegi qualifies for Endangered status due to widespread extirpation across its range. The population near San Pedro de las Colonias was thought to be nearing extinction as of 1990, and a population near Laguna Viesca in Coahuila is thought to have been extinct since 1960. Aridity and increased use of water for irrigation is thought to pose a risk to all populations of T. hartwegi aside from those near Presa El Palmito in Durango.[3]

References

"Trachemys hartwegi". The Reptile Database. Retrieved 2022-03-28.
Rhodin, Anders G.J. (2021-11-15). Turtles of the World: Annotated Checklist and Atlas of Taxonomy, Synonymy, Distribution, and Conservation Status (9th Ed.). Chelonian Research Monographs. Vol. 8. Chelonian Research Foundation and Turtle Conservancy. doi:10.3854/crm.8.checklist.atlas.v9.2021. ISBN 978-0-9910368-3-7. S2CID 244279960.
van Dijk PP (2016) [errata version of 2011 assessment]. "Trachemys gaigeae ". IUCN Red List of Threatened Species. 2011: e.T22024A97429519. doi:10.2305/IUCN.UK.2011-1.RLTS.T22024A9346883.en.

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[:0-1] "Trachemys hartwegi". The Reptile Database. Retrieved 2022-03-28.

[2] Rhodin, Anders G.J. (2021-11-15). Turtles of the World: Annotated Checklist and Atlas of Taxonomy, Synonymy, Distribution, and Conservation Status (9th Ed.). Chelonian Research Monographs. Vol. 8. Chelonian Research Foundation and Turtle Conservancy. doi:10.3854/crm.8.checklist.atlas.v9.2021. ISBN 978-0-9910368-3-7. S2CID 244279960.

[iucn-3] van Dijk PP (2016) [errata version of 2011 assessment]. "Trachemys gaigeae ". IUCN Red List of Threatened Species. 2011: e.T22024A97429519. doi:10.2305/IUCN.UK.2011-1.RLTS.T22024A9346883.en.