Family TRICHODINOPSIDAE Kent, 1881

Body conical, tapered apically; adoral spiral of ca. 360°, with greatly reduced radius, and buccal ciliature relatively inconspicuous; highly specialized infundibular area, with bulbous expansion posteriorly, etc.; denticles smoothly but densely linked, quite numerous (30-40); cortical rings and some scopulary cilia present; macronucleus compact, discoidal; intestinal symbionts of a terrestrial prosobranch snail.

Trichodinopsis Claparéde & Lachmann, 1858. Single spp.