| Contents | Classes | Subclasses | Orders | Suborders | Families |
Incertae sedis in suborder Tetrahymenina:
Family SAGITTARIIDAE R. & L. Grandori, 1935
| For | Proshymenidae |
Conspicuous buccal ciliature of unknown composition, apically located; small body size, with sparse somatic ciliation plus caudal cilium; found in soil.
| Sagittaria R. & L. Grandori, 1934. Single species. |