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Issue: Vol. 4105 No. 2: 20 Apr. 2016
Type: Article
Published: 2016-04-20
DOI: 10.11646/zootaxa.4105.2.6
Page range: 181–197
Abstract views: 92
PDF downloaded: 1

Description of a new species of the genus Chaetostoma from the Orinoco River drainage with comments on Chaetostoma milesi Fowler, 1941 (Siluriformes: Loricariidae)

Museu de Zoologia da Universidade de São Paulo, São Paulo, SP, Brazil. Center for Tropical Paleoecology and Archaeology, Smithsonian Tropical Research Institute, Ancón, Panamá. Laboratorio de Ictiología, Departamento de Biología, Facultad de Ciencias, Pontificia Universidad Javeriana, Bogotá, Colombia.
Laboratorio de Ictiología, Departamento de Biología, Facultad de Ciencias, Pontificia Universidad Javeriana, Bogotá, Colombia. Instituto de Investigación de Recursos Biológicos Alexander von Humboldt. Bogotá, Colombia.
Laboratorio de Ictiología, Departamento de Biología, Facultad de Ciencias, Pontificia Universidad Javeriana, Bogotá, Colombia. Unidad de Ecología y Sistemática (UNESIS) Departamento de Biología, Facultad de Ciencias, Pontificia Universidad Javeriana, Bogotá, Colombia.
Ancistrini taxonomy Hemiancistrus platyrhynchus Andes northern South America Pisces

Abstract

Chaetostoma joropo n. sp. is described from the piedmont of the Orinoco River drainage in Colombia. The new species has been long confused with Chaetostoma milesi, a species with similar overall morphology and color pattern that is restricted to the Magdalena-Cauca River Basin. We diagnose the new species on the basis of morphology as well as a precise description of the color pattern. Chaetostoma joropo n. sp. is also easily distinguished from C. formosae the most similar species and other species inhabiting the Orinoco River drainage in Colombia. Data on ontogenetic variation and sexual dimorphism are provided, as well as natural history notes and remarks on the usage of the name Chaetostoma milesi for specimens from both the Orinoco and Magdalena-Cauca drainages. A discussion on the usage of the name Chaetostoma platyrhynchus is also provided given its current instability in the literature.

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