| Contents | Classes | Subclasses | Orders | Suborders | Families |
Family PSEUDOCOHNILEMBIDAE Evans & Thompson, 1964
| Syn. | Anophryidae |
Body small, elongate-pyriform, with sparse somatic ciliature and single caudal cilium; buccal area long and shallow, provided with two distinctive "membranes" on right (two membranelles in tandem plus the paroral); practically all marine (including brackish and halophilic habitats), free-living forms or scavengers, with occasional species inquilinic in echinoids; but fresh-water and coprozoic strains known in one species.
| Pseudocohnilembus Evans &'Thompson, 1964. Several spp. |
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| Incertae sedis: | |
| Anophrys Cohn, 1866. Single bonafide species (A. sarcophaga, a marine scavenger), in my opinion; the crab-blood form described is a Paranophrys? |