Suborder (1) Archistomatina de Puytorac et al., 1974

Syns.

Cyclotrichina p.p., Didesmina

Cytostome apical; circumoral kinetosomes nonpaired but closely packed; somatic ciliation uniform or limited to tufts or bands; no toxicysts; concrement vacuole present; body ovoid to pyriform; endocommensals, principally in horses and camels but also in rodents, hippopotami, etc.

With characteristics of suborder (above). Body often of small size.

Family BUETSCHLIIDAE Poche, 1913