| Contents | Classes | Subclasses | Orders | Suborders |
Suborder (2) Blepharocorythina Wolska, 1971
| Syns. | Apotrichina, Blepharocorythida, Pharyngotrichina |
| Oral area apical, retractable; prominent frontal lobe and distinctive corkscrew-like process also apical; vestibulum deep; body of small size, with somatic ciliation markedly reduced; remnant of concrement vacuole present; principally in horses, with a few species in elephants and cattle. | Family BLEPHAROCORYTHIDAE Hsiung, 1929 |