(Family):Dorsal fin with a deep notch or completely divided in two. Caudal fin not furcated. Anal fin with 1〜2 spines. Head mostly covered with scales. Lateral line extending to hind margin of caudal fin. Lower jaw with a single or more barbels in some species. (Genus and Species):Lower jaw without barbels. Tip of lower jaw projecting beyond tip of upper jaw. Teeth on jaws minute in bands. Eye extremely small, eye diameter 8.3〜8.5% of HL. Cross section of trunk rounded.
Distribution:
From Costa Rica to Brazil.
Remarks:
This is the only western Atlantic species in this genus.