Species (997)
- Cyrtohymena simplex Dragesco 1966
- Oxytricha fimbriata Müller 1786
- Kerona cypris Müller 1773
- Kerona dubius Fromentel 1876
- Kerona oblonga Dumas 1929
- Kerona polymorphum Foissner 1979
- Kerona rastellum Müller 1786
- Sterkiella admirabilis Foissner 1980
- Sterkiella quadrinucleatus Sick 1933
- Sterkiella tricirrata Buitkamp 1977
- Stylonychia harbinensis Feng, Gu & Zhang 1990
- Stylonychia muscorum Kahl 1932
- Kerona silurus Müller 1786
- Hemiurosoma similis Foissner 1982
- Oxitricha joblottii Bory 1824
- Gastrostyla steini
- Oxytricha halophila Kahl 1932
- Oxitricha pelionella Müller 1773
- Opistotricha macrostoma Dragesco 1972
- Stylonchia curvata
- Stylonichia histrio
- Stylonichia notophora
- Stylonichia mytilus
- Stylonichia putrina
- Opistotricha terricola Gellert 1957
- Stylonichia vorax
- Stylonychia balatonica
- Stylonichya mytilus Ehrenberg
- Stylonychia complanatus
- Stylonychia appendiculatus Ehrenberg 1838
- Stylonychia fissieta Conn 1905
- Stylonychia kahli Dragesco 1966
- Stylonychia makrostyla Sterki 1878
- Stylonychia microstoma
- Stylonychia minimus
- Stylonychia ovalis Dragesco 1966
- Pleurotricha grandis
- Stylonychia mytilus Müller 1773 ssp. mytilus
- Laurentiella acuminata
- Stilonichia pulchra
- Sterkiella similis Buitkamp 1977 ssp. tricirrata
- Stylonychia parallela
- Stylonychia sphagni
- Stylonychia similis
- Opisthotricha paraholophila Wang & Nie 1935
- Steinia dubia Gellert 1956
- Steinia bivacuolata
- Steinia fenestrata Lepsi 1957
- Steinia feruginea Stein 1859
- Steinia simplex Dragesco 1966
- Oxytricha mystacea Stein 1859
- Gonostomum parvum Lepsi 1947
- Histriculus polycirratus Agamliev 1978
- Cyrtohymena fenestrata Lepsi 1957
- Histriculus minimus
- Histriculus tricirratus Buitkamp 1977
- Histriculus acuminatus Maskell 1886
- Oxytricha lundi Dragesco 1970
- Histriculus sphagni
- Gastrostyla parasteinii Small & Lynn 1985
- Allotricha antarctica Berger 1999
- Cerona mytilus
- Cerona lanceolata
- Cerona histrio
- Cerona silurus
- Ceratidium cuneatum
- Clara vorax
- Plagiotricha affinis Stein 1882
- Plagiotricha strenua Engelmann
- Pleurotricha flexilis
- Pleurotricha echinata Stein 1859
- Pleurotricha indica Ammermann, Sapra & Schlegel 1987
- Pleurotricha monilata
- Pleurotricha planensis Fernandez-Leborans 1984
- Opistotricha terrestris Horvath
- Pleurotricha variabilis Reuter 1961
- Pleurotricha tihanyiensis
- Pseudostrombidium planctonicum Horvath 1933
- Pseudouroleptus humicola
- Gastrostyla mystacea Stein 1859 ssp. mystacea
- Gastrostyla mystacea Hemberger 1985 ssp. minima
- Apoamphisiella hymenophora Stokes
- Oxytricha hymenostoma Stokes 1887
- Tachysoma balatonica
- Tachysoma dragescoi Song & Wilbert 1997
- Tachysoma parvistyla Stokes 1887
- Tachysoma fusiformis Gelei & Szabados 1950
- Tachysoma hyalinum
- Tachysoma ovata Song & Wilbert 1997
- Trichoda acarus Müller 1773
- Laurentiella bergeri Dragesco 2003
- Trichoda cypris Müller 1773
- Trichoda histrio
- Trichoda ludio Müller 1773
- Trichoda sannio Müller 1773
- Gastrostyla bavariensis Foissner, Agatha & Berger 2002
- Actinotricha hyalin
- Oxytricha pustulata Ehrenberg
- Gastrostyla vorax Nussbaum 1886
- Hemisincirra gellerti Foissner 1982 ssp. gellerti