Species (22.489)
- Strombidion sulcatum
- Strombidium bilobum
- Strombidium bütschlii
- Ophryoglena flava
- Strongylidium arenicolus Dragesco 1954
- Holophrya bicoronata
- Strongylidium maritimum
- Stylonychia parallela
- Stylonychia sphagni
- Stylonychia similis
- Opisthotricha paraholophila Wang & Nie 1935
- Styloplotes appendiculatus
- Styloplotes fresenii
- Steenstrupiella steenstrupi
- Steenstrupiella pozzii
- Stegochilum sphagnetorum
- Steenstrupiella steenstrupii ssp. steenstrupii
- Steinia dubia Gellert 1956
- Steinia bivacuolata
- Steinia fenestrata Lepsi 1957
- Steinia feruginea Stein 1859
- Steinia simplex Dragesco 1966
- Stephanelytron caytonense
- Oxytricha mystacea Stein 1859
- Amphileptus hirsutus Dumas 1930
- Kolpoda mucronata Müller
- Askenasia elegans Faure 1924
- Chilodonella convexa Kahl 1931
- Chilodon vorax Dumas 1930
- Chilodonella bavariensis Kahl 1931
- Chilodochona quennerstedti Wallengren 1896
- Chilodochona quennerstedti Wallengren 1895
- Cheissinophrya knoeppfleri Puytorac & Dragesco 1969
- Cardiastomatella chesapeakensis Small & Lynn 1985
- Cardiastomatella vermiformis Kahl 1928
- Cardiastomatella minuta Dragesco 1965
- Askensia volvox Claparède & Lachmann 1859
- Bundleia postciliata Strelkow 1939
- Bursaria caudata Dumas 1929
- Buchnerella pheretimae Puytorac & Rakotoarivelo 1965
- Bundleia postciliata Bundle 1895
- Gonostomum parvum Lepsi 1947
- Histriculus polycirratus Agamliev 1978
- Blepharostoma glaucoma Schewiakoff 1892
- Cyrtohymena fenestrata Lepsi 1957
- Blepharostoma glaucoma Schewiakoff 1893
- Histriculus minimus
- Bicoscoeca phiala Stokes 1894
- Chilodonella dentata Dujardin 1841
- Balantidium caviae Cunha 1914
- Balanitizoon gyrans Stokes 1887
- Bakuella marina Jankowski 1979
- Bakuella marina Agamaliev & Alekperov 1976
- Aspidiscopsis bengalensis Naidu 1965
- Baeonidium remigans Perty 1852
- Aspidiscopsis bengalensis Ghosh 1921
- Baeonidium remigans Perty 1849
- Histriculus tricirratus Buitkamp 1977
- Histriculus acuminatus Maskell 1886
- Aselliacineta rossica Jankowski 1981
- Bursaria loxodes Perty 1852
- Cyclidium glaucoma Müller 1773 ssp. glaucoma
- Oxytricha lundi Dragesco 1970
- Histriculus sphagni
- Bursaria virens Perty 1852
- Holosticha setigera
- Gastrostyla parasteinii Small & Lynn 1985
- Amphileptus gutta Kalmus 1929
- Anigsteinia clarissima Isquith 1968
- Allotricha antarctica Berger 1999
- Colpoda infuscata Perty 1849
- Ancistrum arcopagiae
- Ancistrum dosiniae
- Ancistrum hydrobiae
- Ancistrum nucellae
- Anemadesma minuta
- Amphileptus ovum
- Amphileptus parafusidens Song & Wilbert 1989
- Amphileptus moniliger
- Amphileptus sphagni
- Amphileptus proceroformis Song & Wilbert
- Amphileptus sphagnis
- Amphileptus strictus
- Amphileptus teres
- Amphileptus tracheloides
- Amphileptus vorax
- Amphileptus virids
- Amphorellopsis turbinea
- Amphileptus acutus
- Amphileptus affinis Song & Wilbert 1989
- Amphileptus agilis Penard 1922
- Amphileptus anas
- Amphileptus barbatulus
- Amphileptus ensiformis
- Amphileptus incurvata
- Amphileptus fusiformis
- Amallocystis fasciatus
- Ammobaculites amabilis
- Ammobaculites germanicus
- Ammobaculites fontinensis