Trichomycterus barbouri (Eigenmann 1911)

Material examined. 4 exemplars; 19.5 - 59.9 mm SL. Cl FML 7847, 3 ex, 27° 19’ 07.5”S, 65° 41’ 51.2”W Jaya River. Cl FML 7849, 1 ex, 27° 17’ 39.8”S, 65° 51’ 02.0” W Jaya River .

Identification. Small or not visible body papillae; rugose layer of fatty tissue on the body and head; very elongated body; triangular head shape in dorsal view; operculum and interoperculum with odontodes directed towards the posterior region; without mentonian barbels; first pectoral-fin ray elongated caudal fin border emarginated with 13 principal rays; without adipose fin; longitudinal band along the side of the body (Fernández, 2000).