| Curimostoma Kozloff, 1954 (syn. Curinostoma). Single species. |
   |
| Dogielella Poljansky, 1925. Few species. |
| Contents | Classes | Subclasses | Orders | Suborders | Families |
Family CURIMOSTOMATIDAE Jankowski, 1968
| Syn. | Curinostomatidae |
Mouthless forms; body small, pyriform to ovoid in shape; silverline system much like that of Tetrahymena (family Tetrahymenidae, above); obligate endosymbiont in tissues or cavities of fresh-water snails, limpets, clams, and turbellarians.
| Curimostoma Kozloff, 1954 (syn. Curinostoma). Single species. |
|
| Dogielella Poljansky, 1925. Few species. |