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
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 havinga deep area at the external edge of the hypobranchial 1.
Reply to topic for PDF.