Family SICUOPHORIDAE Amaro, 1972

Body plump-ovoid to ellipsoidal, occasionally tailed; sucker (often extensive) rypically present on concave surface of body, uniquely reinforced with polysaccharide skeletal elements (which are also elsewhere on body); buccal ciliature and macronucleus similar to those of preceding family; kinetal sutures vary with genus; endosymbionts in vertebrate hosts only: amphibians, reptiles, and (if Ichthyonyctus remains here) certain fresh-water fishes.

Geimania Albaret, 1975. Few species.
Metasicuophora Albaret, 1973. Single species.
Parasicuophora Albaret, 1968. Few species.
Prosicuophora de Puytorac & Oktem, 1967. Single (more?) species.
Sicuophora de Puytorac & Grain, 1969 (syn. Wichtermania). Several species. Pl. V, Fig. 12m
Incertae sedis:
Ichthyonyctus Jankowski, 1974. Several species.