Echinopsolus Gutt, 1990: 112. Type species: E. acanthocola Gutt, 1990, by original designation.
Microchoerus Gutt, 1990: 105 [non Wood 1844]. Type species: M. splendidus Gutt, 1990, by original designation. [Microchoerus Gutt, 1990 is a junior homonym of Microchoerus Wood, 1844]
Diagnosis [emended]: Cucumariidae with 10 tentacles, the two ventral considerably smaller. Sexes separate and dimorphic, genital papilla large digitiform in males, usually inconspicuous in females, five interradial anterior brood pouches in females (not present in males). Spermatozoa with fusiform head and hollow cylinder-like midpiece encircling anterior end of flagellum; multiple spermatozoa bundled by agglutinating tails to bunch-like spermatozeugmata. Calcareous deposits derived from simple multi-perforate plates.