Costaclis Bartsch, 1947

Type species. Aclis nucleata Dall, 1889b [= Costaclis hyalina (Watson, 1881a)], by original designation; Recent, Caribbean and Northeast Brazil.

Diagnosis. Shell elongated, large (> 10 mm), vitreous; protoconch smooth, subcylindrical, dome shaped; teleoconch with strongly convex whorls, sculptured by numerous axial ribs usually stronger in early whorls; aperture commonly short, umbilicus fissure commonly present (adapted from Bartsch 1947).