| Contents | Classes | Subclasses | Orders | Suborders | Families |
Family KIITRICHIDAE Nozawa, 1941
Cirri relatively uniform, in 7-10 curving ventral rows; body small, rounded-elliptical in outline, with conspicuous peristomial field extending from apical end to well below the equatorial zone of the organism; macronucleus single, marine forms.
[First genus possibly a heterotrich?]
| Caryotricha Kahl, 1932. Single species. |
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| Kiitricha Nozawa, 1941. Single species. |