Fam. Loxocephalidae Jankowski, 1964

- Balanonema Kahl, 1931 [nomen nudum]
- Cardiostomatella Corliss, 1960
- Dexiotricha Stokes, 1885 [Foissner, Berger & Kohmann, 1994]
- Loxocephalus Eberhard, 1862
- Paradexiotricha Grolière, 1975
- Paraloxocephalus Small & Lynn, 1985
- Paratetrahymena Thompson, 1963