Species (36)
- Loxocephalus centralis Stokes
- Cardiastomatella chesapeakensis Small & Lynn 1985
- Cardiastomatella minuta Dragesco 1965
- Cardiastomatella mononucleata Dragesco 1963
- Loxocephalus pelagicus Ruttner 1937
- Loxocephalus foissneri Dragesco & Dragesco-Kerneis 1991
- Dexiotricha tranquilla Kahl 1926
- Cardiostoma mononucleata Dragesco 1963
- Cardiostomatella minuta Dragesco 1965
- Cardiostomatella mononucleata Dragesco 1963
- Loxocephalus singulare Kahl 1926
- Loxocephalus annulatus Kahl 1926
- Loxocephalus colpidiopsis Kahl 1926
- Loxocephalus ellipticus Kahl 1931
- Loxocephalus intermedius Kahl 1928
- Loxocephalus halophilus Kahl 1931
- Loxocephalus granulosus Kent 1881
- Loxocephalus lucidus Smith 1897
- Loxocephalus luridus Eberhard 1862
- Loxocephalus moniligranulatus Kahl 1926
- Loxocephalus plagius Stokes 1885
- Loxocephalus simplex Penard 1922
- Loxocephalus singularis Kahl 1926
- Loxocephalus tranquillus Kahl 1926
- Balanonema biceps Penard 1922
- Balanonema dubium Penard 1922
- Balanonema sapropelica Foissner 1978
- Cardiostomatella vermiforme Kahl 1928
- Dexiotricha centralis Stokes 1885
- Dexiotricha granulosa Kent 1881
- Dexiotricha colpidiopsis Kahl 1926
- Dexiotricha plagia Stokes 1885
- Dexiotricha tranquillus Kahl 1926
- Dexiotrichides centralis Stokes 1885
- Dexiotricha polystyla Foissner 1987
- Paratetrahymena wassi Thompson 1963