(Family): Snout protruding prominently beyond jaws. Hind end of maxilla elongated extremely. No abdominal scute. No spine in fins. Pectoral fin abdominal. (Genus): Dorsal fin origin anterior to anal fin origin. Teeth on jaws numerous and close set. Hind end of maxilla round, not sharp angle. Pseudobranchiae smaller than eye. Inner face of upper limb of 3rd gill arch with rakers. (Species): Anal fin origin just below middle of dorsal fin. Pectoral fin tip not reaching pelvic fin bese. A broad silver band on side.
Distribution:
Off Guiana to northern coast of Brazil.
Remarks:
In A. brevirostris anal fin origin locates just below posterior end of dorsal fin base. (Shimizu)