Family CLAUSILOCOLIDAE de Puytorac, n. fam.

Syn.	Proclausilocolidae

Body comma-shaped or broadly ellipsoidal in form, flattened, and not especially elongate; thigmotactic area present at anterior end but weakly developed and without well-defined sucker; infraciliary pattern differs from that of the Haptophryidae; scattered contractile vacuoles; two species are commensals in the body caviry of certain land snails, with a third described from African earthworms.

[Jankowski (1975) proposed a familial name, Proclausilocolidae, for the same group of genera but offered no description or characterization. Since de Puytorac has independently been planning for some years to establish the family as named here, I am crediting him with the taxon, but as of the date of the present work, where the group's characterization is apparently first appearing.]

Clausilocola Lom 1959. Single species.
Haptophryopsis de Puytorac, 1971. Single species [in earthworms].
Proclausilocola Lom, 1959. Single species.