Family STENTORIDAE Carus, 1863

Majestic in size and movement; trumpet-shaped, elongate, uniformly ciliated, highly conüactile; oral ciliature spirals clockwise nearly 360° around flared-out anterior end; stomatogenesis apokinetal; often pigmented and/or with symbiotic zoochlorellae; a few species with mucilaginous loricae; macronucleus commonly moniliform; rypically in fresh-water habitats only.

[The validiry of Parastentor and the taxonomic position of the curious fish parasite Stentoropsis remain questionable. The latter genus may well belong in the following suborder, with the bulk of the other endocommensalistic heterotrichs.]

Stentor Oken, 1815 (a nomen conservandum) (Syns. Stentorella, Stentorina). Many species.
Incertae sedis:
Parastentor Vuxanovici, 1961, single species.
Stentoropsis Dogiel & Bychowsky, 1934: single species.