Maxillary barbels longer than head, bearing externally short and tuberculate ramifications and a broad membrane extending along their basal part; outer mandibular barbels with simple, thick ramifications, branches of inner mandibular barbels tuberculate, sometimes subdivided (Ref. 57223). Mandibular teeth short, numbering 59-66 (Ref. 57223). Pectoral-fin spines very strongly denticulate on inner margin, but nearly smooth on outer margin; dorsal-fin spine denticulate on front margin and prolonged into a filament (Ref. 57223). Humeral process deep, granulose and not keeled ventrally (Ref. 57223). Adipose fin very well developed and contiguous to rayed dorsal fin (Ref. 57223).Colour: General background greyish-brown, colour pattern inverted, the ventral areas being dark (Ref. 57223).