''Chaetostoma platyrhynchus'' is a species of catfish in the family Loricariidae. It is native to South America, where it occurs in the Caquetá River basin in

Colombia Colombia (, ; ), officially the Republic of Colombia, is a country in South America with insular regions in North America—near Nicaragua's Caribbean coast—as well as in the Pacific Ocean. The Colombian mainland is bordered by the Car ...

. The species reaches 9.5 cm (3.7 inches) in total length. The species is known to be of disputed classification and spelling.

Classification dispute

This species was originally described as a species of '' Hemiancistrus'' by

Henry Weed Fowler Henry Weed Fowler (March 23, 1878 – June 21, 1965) was an American zoologist born in Holmesburg, Pennsylvania. He studied at Stanford University under David Starr Jordan. He joined the Academy of Natural Sciences in Philadelphia and worked as ...

in 1943, although it was subsequently moved to ''

Peckoltia ''Peckoltia'' is a genus of small South American Loricariidae, armored suckermouth catfishes. Many of these fish are popular aquarium fish. Taxonomy ''Peckoltia'' is a Basal (phylogenetics), basal genus within the tribe Ancistrini of the subfami ...

'' by

Isaäc J. H. Isbrücker Isaäc Jan Hendrik Isbrücker (born 1944) is a retired Dutch ichthyologist who specialised in the scientific classification of South American catfish (Loricarioidea). Life and work Between 1960 and 1985 Isbrücker was a keeper of the aquarium in ...

in 1980, and later moved to '' Cordylancistrus'' in 1996 by W. E. Burgess and L. Finley. In 2004, 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 ...

reclassified the species as a member of ''Chaetostoma'', although

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.

and ITIS both refer to it as ''Cordylancistrus platyrhynchus'', and neither source lists either of Armbruster's names (''Chaetostoma platyrhynchus'' and ''C. platyrhyncha'') for the species as a synonym.

Spelling dispute

In his 2004 reclassification, Armbruster used ''platyrhyncha'' and ''platyrhynchus'' interchangeably when referring to the species. In 2008, Armbruster referred to the species as ''C. platyrhynchus'' rather than ''C. platyrhyncha'', which became the standard spelling. Armbruster and Milton Tan referred to the species as ''C. platyrhyncha'' in their 2012 description of ''Cordylancistrus santarosensis'' (which has subsequently been reclassified as '' Transancistrus santarosensis''), furthering the confusion surrounding the correct spelling of the name. In 2016, Gustavo A. Ballen of the University of London and Alexander Urbano-Bonilla and Javier A. Maldonado-Ocampo of the Pontifical Xavierian University ruled that changing the specific epithet to ''platyrhyncha'' or ''platyrhynchum'' to comply with the

ICZN The International Code of Zoological Nomenclature (ICZN) is a widely accepted convention in zoology that rules the formal scientific naming of organisms treated as animals. It is also informally known as the ICZN Code, for its publisher, the I ...

's name gender guidelines was not in this case justified and that the species should be referred to as ''Chaetostoma platyrhynchus''.Ballen, G. A., Urbano-Bonilla, A., & Maldonado-Ocampo, J. A. (2016). Description of a new species of the genus Chaetostoma from the Orinoco River drainage with comments on Chaetostoma milesi Fowler, 1941 (Siluriformes: Loricariidae). ''Zootaxa'', ''4105''(2), 181–197.

References

{{Taxonbar, from=Q112116280 platyrhynchus Fish described in 1943 Fish of Colombia