Monterrey platyfish

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Monterrey platyfish

Extinct in the Wild  (IUCN 3.1)[1]
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Class: Actinopterygii
Order: Cyprinodontiformes
Family: Poeciliidae
Genus: Xiphophorus
Species:
X. couchianus
Binomial name
Xiphophorus couchianus
(Girard, 1859)
Synonyms[2]
  • Limia couchiana Girard, 1859
  • Platypoecilus couchianus (Girard, 1859)
  • Poecilia couchii Günther, 1866

The Monterrey platyfish (Xiphophorus couchianus) is a species of

live-bearer, it was native to a very small section of the San Juan River system (itself part of the Rio Grande basin) in the vicinity of the city of Monterrey, Mexico.[2][3] The specific name refers to the American soldier and naturalist Darius N. Couch (1822–1897) who collected the type on a self financed expedition to Mexico.[4]

Appearance

The Monterrey platyfish is a dull-colored fish, appearing not unlike a female

aff. couchianus, was discovered in Apodaca, central Monterrey, in 1983. It has large black blotching, unlike the typical, unspotted form from the Huasteca Canyon. Whether the Apodaca form represents a separate species is presently unclear.[3][5][6]

Sexual dimorphism is moderate, the male Monterrey platyfish growing to a maximum overall length of 4 cm (1.6 in) and the female 6 cm (2.4 in).[2]

Conservation

Genetic Stock Center at Texas State University, United States (maintaining typical form), via the American Livebearer Association that mostly includes private aquarists in the United States (maintaining typical form), and by XNP conservation project members, which include public aquariums, universities and private aquarists in several European countries and the United States (maintaining typical form).[3][5][7][8] The species has proven harder to maintain in captivity than most Xiphophorus species.[5]

The Monterrey platyfish shares the title as northernmost naturally distributed Xiphophorus with the closely related northern platyfish (X. gordoni) and marbled swordtail (X. meyeri), which are two species that also are restricted to northeastern Mexico and seriously threatened.[3][9]

References

  1. ^
    doi:10.2305/IUCN.UK.2019-2.RLTS.T23156A157724204.en
    . Retrieved 20 November 2021.
  2. ^ a b c Froese, Rainer; Pauly, Daniel (eds.) (2018). "Xiphophorus couchianus" in FishBase. September 2018 version.
  3. ^
    ISBN 978-607-16-4087-1
    .
  4. ^ Christopher Scharpf; Kenneth J. Lazara (26 October 2019). "Order CYPRINODONTIFORMES: Families POECILIIDAE, ANABLEPIDAE, VALENCIIDAE, APHANIIDAE and PROCATOPODIDAE". The ETYFish Project Fish Name Etymology Database. Christopher Scharpf and Kenneth J. Lazara. Retrieved 9 November 2019.
  5. ^ a b c Coletti, T. (December 2007). "Preserving Xiphophorus couchianus in the Home Aquarium, Part I: Sad History & Unanswered Questions". tfhmagazine.com. Retrieved 23 September 2018.
  6. PMID 18377209
    .
  7. ^ "XNP project annual report – year 3". Österreichischen Verband für Vivaristik und Ökologie. Retrieved 17 January 2022.
  8. ^ "XNP project expanding". Österreichischen Verband für Vivaristik und Ökologie. Retrieved 17 January 2022.
  9. PMID 23360326
    .
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