Species (527)
- Metopus daphanides Jankowski 1964
- Metopus darwini Kahl 1927
- Metopus daphnides Jankowski 1964
- Metopus denarius Kahl 1932
- Metopus entorhipidioides Jankowski 1964
- Metopus dentatus Kahl 1932
- Metopus extensus Kahl 1926
- Metopus es Müller 1776
- Metopus fastigatus Kahl 1927
- Metopus halophilus Kahl 1928
- Metopus fuscus Kahl 1927
- Metopus intercedens Kahl 1927
- Metopus hyalinus Kahl 1932
- Metopus rectus Kahl 1932
- Metopus ridiculus Kahl 1927
- Metopus rostratus Kahl 1926
- Metopus rotundus Scott Lucas 1934
- Metopus sapropelicus Tucolesco 1962
- Metopus sigmoides Claparède & Lachmann 1858
- Blepharisma albicans Dumas 1937
- Blepharisma botezati Lepsi 1926
- Blepharisma bimicronucleatum Villeneuve-Brachon 1940
- Blepharisma biancae Lepsi 1948
- Blepharisma americanum Suzuki 1954
- Blepharisma bothrostoma Stokes 1887
- Blepharisma brevifiliformis Isquith 1966
- Blepharisma candidum Yagiu & Shigenaka 1956
- Blepharisma caudatus Dumas 1937
- Blepharisma clarissimum Anigstein 1912
- Blepharisma coeruleum Gajewskaja 1927
- Blepharisma dileptus Kahl 1928
- Blepharisma elegans Vuxanovici 1963
- Blepharisma elongatum Stokes 1884
- Blepharisma fusiforme Vuxanovici 1963
- Blepharisma galianoi Fernandez-Leborans 1979
- Blepharisma giesei Hirshfield, Isquith & Bhandary 1965
- Blepharisma grayi Hartwig & Parker 1977
- Blepharisma halophilium Ruinen 1938
- Blepharisma ichthyoides Gelei 1933
- Blepharisma intermedium Bhandary 1962
- Blepharisma japonicum Suzuki 1954
- Blepharisma lateritium Ehrenberg 1831
- Blepharisma lentis Gelei 1954
- Blepharisma melanum Borror 1963
- Blepharisma minima Lepsi 1926
- Blepharisma multinodatum Hirshfield, Isquith & Bhandary 1965
- Blepharisma musculus Penard 1922
- Blepharisma ovalis Dumas 1937
- Blepharisma violaceae Tucolesco 1962
- Blepharisma wardsi Hirshfield, Isquith & Bhandary 1965
- Blepharisma vitreum Lepsi 1957
- Brachonella caenomorphoides Foissner 1980
- Brachonella campanula Kahl 1932
- Brachonella darwini Kahl 1927
- Brachonella cydonia Kahl 1927
- Brachonella contorta Levander 1894
- Brachonella elongata Jankowski 1964
- Brachonella galeata Kahl 1927
- Brachonella spiralis Smith 1897
- Brachonella inversa Jankowski 1964
- Atriofolliculina hirundo Kent 1881
- Blepharisma falcatum Gelei 1954
- Blepharisma multinucleatum Dragesco 1960
- Blepharisma roseopersicina Brehm 1948
- Blepharisma salinarum Florentin 1899
- Blepharisma seculum Isquith, Repak & Hirshfield 1965
- Blepharisma semiliformis Isquith 1966
- Blepharisma seshachari Bhandary 1962
- Blepharisma sinosum Sawaya
- Blepharisma sphagni Lepsi 1926
- Blepharisma tardum Kahl 1928
- Blepharisma steini Kahl 1932
- Blepharisma stoltei Isquith 1966 ssp. narai
- Blepharisma tenuis Kahl 1926
- Blepharisma trinodatum Hirshfield, Isquith & Bhandary 1965
- Blepharisma tropicum Seshachar & Bhandary 1962
- Blepharisma undulans Stein 1867
- Blepharisma velatum Vacelet 1961
- Blepharisma vestitum Kahl 1932
- Balantidiopsis muscicola Penard 1922
- Balantidium acanthuri Grim 1989
- Balantidium bacteriophoros Fenchel 1980
- Atriofolliculina andrewsi Hadzi 1951
- Atriofolliculina faureana Hadzi 1951
- Bothrostoma mirabilis Kahl 1927
- Bothrostoma undulans Stokes 1887
- Brachonella caduca Kahl 1927
- Balantidium prionurium Grim 1985
- Balantidium zebrascopi Grim 1992
- Caenomorpha capucina Kahl 1932
- Caenomorpha levanderi Kahl 1927
- Caenomorpha medusula Perty 1852
- Caenomorpha parva Wetzel 1928
- Caenomorpha simplex Jankowski 1964
- Caenomorpha sapropelica Kahl 1927
- Caenomorpha sp.
- Caenomorpha steini Bütschli 1879
- Caenomorphina heinrici Blochmann ?
- Caenomorpha uniserialis Levander 1894
- Caenomorpha aculeata Wetzel 1928