Fauré-Fremiet, 1961
Body sometimes elongate, even tailed, but often oval to elliptical in outline. Ventral cirri typically heavy, conspicuous, arranged in specific localized groups. Marginal cirri often absent or reduced. Stomatogenesis apokinetal. In widely diverse habitats, few symbiotic (ectocommensals, inquilines).
Family Oxytrichidae
Family Aspidiscidae
Family Euplotidae