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Gila topminnow Poeciliopsis occidentalis.jpg
Gila topminnow (P. occidentalis)
Scientific classification e
Kingdom: Animalia
Phylum: Chordata
Class: Actinopterygii
Order: Cyprinodontiformes
Family: Poeciliidae
Subfamily: Poeciliinae
Genus: Poeciliopsis
Regan, 1913
Type species
Poecilia presidionis
D. S. Jordan & Culver, 1895

Poeciliopsis is a genus of poeciliid fishes that primarily are native to Mexico and Central America. The only exceptions are P. turrubarensis where the range extends into Colombia, and P. occidentalis where the range extends into Arizona and New Mexico, and P. gracilis which has been accidentally introduced into fast flowing drainage ditches that flow into the north-eastern end of the Salton Sea in California.


There are currently 24 recognized species in this genus: [1]

Hybrid species[edit]

Poeciliopsis monacha—occidentalis is a unisexual (all female) hybridogenic lineage. It is an ancient clonal lineage that appears to be more than 100,000 generations old.[2] The maternal ancestor was P. monacha and the paternal ancestor was P. occidentalis.


  1. ^ Froese, Rainer, and Daniel Pauly, eds. (2012). Species of Poeciliopsis in FishBase. August 2012 version.
  2. ^ Quattro JM, Avise JC, Vrijenhoek RC (1992). "An ancient clonal lineage in the fish genus Poeciliopsis (Atheriniformes: Poeciliidae)". Proc. Natl. Acad. Sci. U.S.A. 89 (1): 348–52. doi:10.1073/pnas.89.1.348. PMC 48234Freely accessible. PMID 11607248.