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Description of a new species of the catfish genus Trichomycterus

Trichomycterus tete

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#1 scotcat

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Posted 18 December 2011 - 07:19 PM

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 J. E. M. COSTA


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-fi n rays, the fi rst pectoral-fi n 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-fi n rays,

caudal fi n truncated, body slender (body depth 12.3 – 13.6% SL), shorter dorsal-fi n base (dorsal-fi n 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.

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