Editorial Type:
Article Category: Research Article
 | 
Online Publication Date: 01 Aug 2002

New Species of Trichomycterus from the Andes of Argentina with a Redescription of Trichomycterus alterus (Siluriformes: Trichomycteridae)

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Page Range: 739 – 747
DOI: 10.1643/0045-8511(2002)002[0739:NSOTFT]2.0.CO;2
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Abstract

Trichomycterus belensis, new species, is described from a tributary to Laguna Blanca, a high-elevation drainage in the Departamento Belén, Provincia de Catamarca, Argentina. The new species is distinguished from other members of the apparently nonmonophyletic genus Trichomycterus by a combination of features involving the premaxilla, dentition, barbel form, pigmentation, and morphometrics. Trichomycterus alterus, whose original description was based on a limited number of specimens, is redescribed based on numerous specimens from localities in the central and northwestern portions of Argentina.

Resumen

Trichomycterus belensis, nueva especie, es descripta de un tributario de Laguna Blanca de elevada altura en el departamento Belén, Provincia de Catamarca, Argentina. La nueva especie se distingue de otros miembros del género Trichomycterus, aparentemente no monofilético, por la combinación de rasgos del premaxilar, dentición, forma de la barbilla, pigmentación y morfométricos. Trichomycterus alterus, cuya descripción original estaba basada en un número limitado de ejemplares, es redescripta basada en numerosos especimenes de localidades de la parte central y noroeste de Argentina.

Copyright: The American Society of Ichthyologists and Herpetologists
 Fig. 1. 
 Fig. 1. 

Trichomycterus belensis, new species, holotype, FML 2530, 63.5 mm SL, left lateral view; Argentina, Provincia de Catamarca, Departamento Belén, stream tributary to Laguna Blanca


 Fig. 2. 
 Fig. 2. 

Trichomycterus alterus, FML 2085, 49.2 mm SL, left lateral view; Argentina, Provincia de La Rioja, Departamento San Blás, Andalucas


Received: 05 Oct 2001
Accepted: 08 Mar 2002
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