''Aphanotorulus unicolor'' is a species of catfish in the family Loricariidae. It is native to South America, where it occurs in the upper

Amazon River The Amazon River (, ; es, Río Amazonas, pt, Rio Amazonas) in South America is the largest river by discharge volume of water in the world, and the disputed longest river system in the world in comparison to the Nile. The headwaters of t ...

basin. The species reaches 13.9 cm (5.5 inches) SL. ''A. unicolor'' was originally described as ''Plecostomus unicolor'' by

Franz Steindachner Franz Steindachner (11 November 1834 in Vienna – 10 December 1919 in Vienna) was an Austrian Zoology, zoologist, ichthyologist, and herpetologist. He published over 200 papers on fishes and over 50 papers on reptiles and amphibians. Steindachne ...

in 1908. It was subsequently listed as a member of ''

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 ...

'' by I. J. H. Isbrücker, I. Seidel, J. Michels, E. Schraml, and A. Werner in 2001.Isbrucker, I., Seidel, I., Michels, J., Schraml, E., & Werner, A. (2001). Diagnose vierzehn neuer Gattungen der Familie Loricariidae Rafinesque, 1815 (Teleostei, Ostariophysi). In 2004, Jonathan W. Armbruster classified the species within '' Hypostomus'' instead of ''Aphanotorulus''. In 2016, following a review of '' Isorineloricaria'' and ''

'' by C. Keith Ray and Armbruster (both 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 ...

), the species was transferred once again to ''Aphanotorulus''.

References

Fish described in 1908 Loricariidae {{loricariidae-stub