The northern platyfish (Xiphophorus gordoni) is a small, endangered species of fish in the family Poeciliidae.[2] It is endemic to the vicinity of Cuatro Ciénegas in the Mexican state of Coahuila. It is restricted to hot-spring heated ditches and marshes of the Laguna Santa Tecla. Its native water is shallow and vegetation-choked, with very stable temperatures that generally are around 27–30 °C (81–86 °F), although captive studies show the species also can live in slightly colder water.[1][3][4][5]
The species is primarily threatened by habitat loss due to construction of irrigation channels.[1] Captive "safety" populations are kept at the Xiphophorus Genetic Stock Center, Texas State University, United States,[1] and by XNP conservation project members, which include public aquariums, universities and private aquarists in several European countries and the United States.[6][7][8]
It was named in honor of Myron Gordon by Robert Rush Miller and W. L. Minckley who discovered it with Carl Hubbs on a 1961 expedition.[3][9] The northern platyfish shares the title as northernmost naturally distributed Xiphophorus with the closely related Monterrey platyfish (X. couchianus) and marbled swordtail (X. meyeri).[4][10]
^ abcdMatamoros, W.A.; Hendrickson, D.; Vega-Cendejas, M. (2019). "Xiphophorus gordoni". IUCN Red List of Threatened Species. 2019: e.T23157A2784873. doi:10.2305/IUCN.UK.2019-2.RLTS.T23157A2784873.en. Retrieved 15 November 2021.
^Froese, Rainer; Pauly, Daniel (eds.) (2019). "Xiphophorus gordoni" in FishBase. April 2019 version.
^ ab"Xiphophorus gordoni, a New Species of Platyfish from Coahuila, Mexico" (PDF). Desert Fishes.org. Retrieved 6 July 2017.
^ abCeballos, G.; E.D. Pardo; L.M Estévez; H.E. Pérez, eds. (2016). Los peces dulceacuícolas de México en peligro de extinción. Fondo de Cultura Económic. pp. 48, 280. ISBN 978-607-16-4087-1.
^"Northern Platyfish Husbandry Manual". Österreichischen Verband für Vivaristik und Ökologie. Retrieved 17 January 2022.
^"XNP project annual report – year 3". Österreichischen Verband für Vivaristik und Ökologie. Retrieved 17 January 2022.
^"XNP project expanding". Österreichischen Verband für Vivaristik und Ökologie. Retrieved 17 January 2022.
^"Transfer of fish from Würzburg University to Ostrava ZOO". Österreichischen Verband für Vivaristik und Ökologie. Retrieved 17 January 2022.
^Christopher Scharpf & Kenneth J. Lazara (22 September 2018). "Order CYPRINODONTIFORMES: Families POECILIIDAE, ANABLEPIDAE, VALENCIIDAE, APHANIIDAE and PROCATOPODIDAE". The ETYFish Project Fish Name Etymology Database. Christopher Scharpf and Kenneth J. Lazara. Retrieved 6 December 2021.
^Kang, J.H.; M. Schartl; R.B. Walter; A. Meyer (2013). "Comprehensive phylogenetic analysis of all species of swordtails and platies (Pisces: Genus Xiphophorus) uncovers a hybrid origin of a swordtail fish, Xiphophorus monticolus, and demonstrates that the sexually selected sword originated in the ancestral lineage of the genus, but was lost again secondarily". BMC Evolutionary Biology. 13 (25): 25. Bibcode:2013BMCEE..13...25K. doi:10.1186/1471-2148-13-25. PMC 3585855. PMID 23360326.
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