Fam. Frontoniidae Kahl, 1926

- Didieria Small & Lynn, 1985
- Disematostoma Lauterborn, 1894
- Frontonia Ehrenberg, 1838
- Frontoniella Wetzel, 1927 [syn. of Frontonia]
- Paraclathrostoma Small & Lynn, 1985
- Wenrichia Jankowski, 1967 [syn. of Disematostoma]

Incertae sedis in Family Frontoniidae

- Schistophrya Kahl, 1933
- Sigmostomum Gulati, 1925 [syn. of Frontonia]