''Isorineloricaria villarsi'' is a species of catfish in the family Loricariidae. It is native to South America, where it is known only from Venezuela. The species reaches 32 cm (12.6 inches) in

standard length Fish measurement is the measuring of individual fish and various parts of their anatomies. These data are used in many areas of ichthyology, including taxonomy and fisheries biology. Overall length * Standard length (SL) is the length of a fish m ...

and is believed to be a facultative air-breather. ''Isorineloricaria villarsi'' was originally described as a member of ''Plecostomus'' by

Christian Frederik Lütken Christian Frederik Lütken (; 7 October 1827, in Sorø – 6 February 1901), was a Denmark, Danish zoologist and naturalist. In 1852, he resigned his commission as a lieutenant with the Danish army, and earned his master's degree in sciences the ...

in 1874, although it was subsequently transferred to '' Hypostomus'' after ''Plecostomus'' was found to be an invalid genus. It was later classified within the now-invalid genus ''Squaliforma'', although a 2016 taxonomic review of the genera ''

Aphanotorulus ''Aphanotorulus'' is a genus of armored catfishes native to the Amazon, Orinoco, Essequibo and Jaguaribe basins in South America.Ray, C.K. & Armbruster, J.W. (2016): The genera ''Isorineloricaria'' and ''Aphanotorulus'' (Siluriformes: Loricar ...

'' and '' Isorineloricaria'' conducted by Jonathan W. Armbruster (of

Auburn University Auburn University (AU or Auburn) is a public land-grant research university in Auburn, Alabama. With more than 24,600 undergraduate students and a total enrollment of more than 30,000 with 1,330 faculty members, Auburn is the second largest uni ...

) and C. Keith Ray found it to be a member of ''Isorineloricaria''.Ray, C. K., & Armbruster, J. W. (2016). The genera Isorineloricaria and Aphanotorulus (Siluriformes: Loricariidae) with description of a new species. ''Zootaxa'', ''4072''(5), 501–539. https://doi.org/10.11646/zootaxa.4072.5.1

FishBase FishBase is a global species database of fish species (specifically finfish). It is the largest and most extensively accessed online database on adult finfish on the web.

lists the species as ''Squaliforma villarsi''.

References

Hypostominae Fish described in 1874 Catfish of South America {{Loricariidae-stub