| Contents | Classes | Subclasses | Orders | Suborders | Families |
Family REICHENOWELLIDAE Kahl, 1932
Body ellipsoidal, with narrowed peristomial field; somatic ciliation uniform, occasionally slightly spiraled; macronucleus elongate but not moniliform; in fresh-water or edaphic habitats.
| Balantidioides Kahl, 1930 (for Balantidiopsis Pen. [non Büt.]). Few spp. |
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| Reichenowella Kahl, 1932. Single species. |