FAMILY CTENOSCULIDAE THIELE, 1925

Diagnosis: Mesoparasites of sea stars, forming cysts. Ovoid or subspherical carapace, with short posteroventral or ventral aperture. Antennules minute or absent. Labrum with short frontal side; mandibles absent; maxillae bifid, non-hooked. Thorax big, elongated, with dorsal projections or long horns. Six pairs of large, leaf-like, simplified thoracopods, mostly biramous, sometimes uniramous. Abdomen four-segmented. Penis vestigial or absent. Adult males unknown.

Ctenosculum Heath, 1910 (one species)

Endaster Grygier, 1985 (one species)

Gongylophysema Grygier, 1987 (one species)