Brian, 1921
Body variable in shape. A1 short, prehensile in male. A2 Exp well-developed. Md with biramous palp. P1 not prehensile, similar to P2; all with 3-segmented Exp and Enp. P5 lamelliform, 2-segmented. Ovisac simple (from Rose, 1933)
One species, Euterpina acutifrons, of the only pelagic genus Euterpina Norman, 1903 in the family, is known from the South Atlantic.