| Cirrhogaster Ozaki & Yagiu, 1941. Single species. |
 |
| Euplotidium Noland, 1937. Few species. |
 |
| Gastrocirrhus Lepsi, 1928. Few species. |
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| Contents | Classes | Subclasses | Orders | Suborders | Families |
Family GASTROCIRRHIDAE Fauré-Fremiet, 1961
No marginal cirri; other cirri large and in unusual patterns; expansive buccal cavity or peristomial field, with anterior end of body remarkably truncate (most pronounced in Gastrocirrhus); all marine or psammophilic forms.
| Cirrhogaster Ozaki & Yagiu, 1941. Single species. |
|
| Euplotidium Noland, 1937. Few species. |
|
| Gastrocirrhus Lepsi, 1928. Few species. |
|