Metopidius Wagler, Isis, 1832, col. 279.
Type, Parra oena Gav.=Parra indica Lath,
Head small; bill moderately long, straight and compressed, the culmen curved at the tip; a lappet at the base of the bill resting against the forehead and rounded behind; tail short; wing not rounded, the first and second primaries subequal and longest; a tubercular spur on the carpal joint; middle too without claw longer than tarsus, hind claw excessively long ; tarsus transversely shielded before and behind.
Sexes alike but juvenile and adult plumage greatly differing* the latter acquired by a spring moult when the bird is a year old.
A single species.
* Lowe, " On the Systematic Position of the Jacanidae" Ibis, 1925, pp. 132-147.