Maxillary barbels longer than head, unbranched, without tubercles and bordered by a distinct black basal membrane; outer mandibular barbels with numerous short and simple ramifications, branches of inner mandibular barbels short, simple, but thick and sometimes tuberculate (Ref. 57223). Mandibular teeth long, numbering 33-50 (Ref. 57223). Dorsal-fin spine and branched dorsal-fin rays prolonged into short filaments, the spine smooth anteriorly; denticulations of pectoral-fin spines finer on outer than on inner margin (Ref. 57223). Humeral process rather slender, granulose, pointed and ventrally keeled (Ref. 57223). Adipose fin well developed and rather close to rayed dorsal fin (Ref. 57223).Colour: Rather dark, slightly lighter on belly; fins blackish, sometimes faintly spotted (Ref. 57223).