Suborder (2) Prostomatina Schewiakoff, 1896

Generally unspecialized in all characteristics, as in order s.s. and subclass s.s. (above). Microphagous; no toxicysts; loricae produced by several species.

Cytostome apical, round; body radially symmetrical; ciliation uniform; cytopharyngeal apparatus of simple rhabdos type.	Family HOLOPHRYIDAE Perry, 1852
Generally unspecialized, but distinguished by production of pseudochitinous loricae of several shapes; one or more caudal cilia.	Family METACYSTIDAE Kahl, 1926