Head sharp-snouted, snout pointed or obtusely pointed, straight, about 1/3 to 3/4 of postorbital length; mouth terminal, chin with thick, blunt, cylindrical or slightly tapering barbel; at most 10 teeth in single rows in either jaw.
Species:
Gnathonemus echidnorhynchus
Gnathonemus histrio
Gnathonemus longibarbis
Gnathonemus petersii