Vertebrate Zoology 61(3): 300-307, doi:
Description of a new species of the catfish genus Trichomycterus (Teleostei: Siluriformes: Trichomycteridae) from the rio de Contas basin, northeastern Brazil
Maria Anaïs Barbosa, Wilson José Eduardo Moreira da Costa‡§‡ Rio de Janeiro, Brazil§ Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil
Corresponding author: Maria Barbosa ( anaisbarbosa@yahoo.com.br ) © Maria Barbosa, Wilson Costa. This is an open access article distributed under the terms of the Creative Commons Attribution License (CC BY 4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. Citation:
Barbosa MA, Costa WJEM (2011) Description of a new species of the catfish genus Trichomycterus (Teleostei: Siluriformes: Trichomycteridae) from the rio de Contas basin, northeastern Brazil. Vertebrate Zoology 61(3): 300-307 |  |
Abstract
Trichomycterus tete, new species is described from the upper rio de Contas basin, northeastern Brazil. It is the fi rst record of the genus to the Caatinga semi-arid region. The new species is distinguished from all its congeners by having a combination of eight pectoral-fin rays, the fi rst pectoral-fin ray prolonged as a fi lament, metapterygoid deeper than wide, short maxillary barbel reaching the middle of opercular patch of odontodes, narrow head (head width 68.07 – 77.5% HL), 11 dorsal-fin rays, caudal fin truncated, body slender (body depth 12.3 – 13.6% SL), shorter dorsal-fin base (dorsal-fin base length 9.5 – 11.4% SL), and an uncommon color pattern. In addition, T. tete differs from all the congeners from southeastern Brazil by having a deep area at the external edge of the hypobranchial 1.
Keywords
Caatinga, Loricarioidea, Neotropical ichthyofauna, semi-arid region, systematics, taxonomy, Trichomycterinae.