Species (1.575)
- Opercularia ramosa Stokes 1889
- Ophrydium eutrophicum Foissner 1979
- Ophrydium glans Claparède & Lachmann 1858
- Ophrydium hyalinum Wrzesniowski 1877
- Ophrydium lemnae Kahl 1935
- Ophrydium ophrydiiforme Nüsslin 1884
- Ophrydium naumanni Pejler 1962
- Ophrydium pictum Kent 1882
- Ophrydium problematicum Kerrick ?
- Ophrydium sessile Kent 1882
- Ophrydium sigmoides Kellicott ?
- Ophrydium vernale Stokes 1887
- Paramecium aureolum Perty 1852
- Paramecium bursaria Ehrenberg 1831
- Paramecium biumbonatum Dumas 1929
- Paramecium caudatum Ehrenberg 1833
- Paramecium calkinsi Woodruff 1921
- Paramecium chilodonides Baumeister in Kahl 1931
- Paramecium chrysalis Müller 1786
- Paramecium chlorelligerum Kahl 1935
- Paramecium colpoda Ehrenberg 1831
- Paramecium compressum Ehrenberg 1838
- Paramecium cordiformis Dumas 1929
- Paramecium cucullio Quennerstedt 1867
- Paramecium ellipsoides Dumas 1929
- Paramecium elongatum Dumas 1930
- Paramecium cucumula Dumas 1929
- Paramecium ficarium Kahl 1928
- Paramecium flavum Fromentel 1876
- Paramecium glaucum Claparède & Lachmann 1859
- Paramecium marginatum Dumas 1930
- Paramecium leucas Perty 1852
- Paramecium griseolum Perty 1852
- Paramecium inversum Claparède & Lachmann 1859
- Paramecium milium Müller 1773
- Paramecium nigrum Bürger 1908
- Paramecium nephridiatum Gelei 1925
- Paramecium orbiculare Dumas 1929
- Paramecium ovale Claparède & Lachmann 1859
- Paramecium ovatum Ehrenberg 1830
- Paramecium patella Dumas 1930
- Paramecium polycarium Woodruff 1923
- Paramecium regulare Fromentel 1876
- Paramecium roseum Fromentel 1876
- Paramecium rostratum Dumas 1930
- Paramecium sinaiticum Ehrenberg 1831
- Paramecium sonneborni Aufderheide, Daggett & Nerad 1983
- Paramecium scutellinum Dumas 1929
- Paramecium subovatum Fromentel 1876
- Paramecium sinuosum Dumas 1929
- Paramecium subradiatum Dumas 1929
- Paramecium trichium Stokes 1885
- Paramecium traunsteineri Baumeister in Kahl 1931
- Paramecium viridis Dumas 1930
- Paramecium versutum Perty 1852 ssp. alpina
- Paramecium woodruffi Wenrich 1928
- Paramaecia kolpoda Losana 1829
- Paramecium aurelia Müller 1773
- Paramecium acutum Dumas 1929
- Paramecium marinum Kent 1881
- Paramecium microstomum Claparède & Lachmann 1859
- Paramecium multimicronucleatum Powers & Mittchell 1910
- Paramecium nucleus Schrank 1803
- Paramecium putrinum Claparède & Lachmann 1859
- Paramecium pyriforme Gourret & Roeser 1886
- Philasterides armatus Kahl 1926
- Philasterides dicentrarchi Dragesco A. et al. 1995
- Amphorellina subacuta Colom 1948
- Apiosoma piscicola Blanchard 1885
- Epistylis podurae Dumas 1930
- Epistylis racemosa Penard 1922
- Epistylis ramosa Stokes 1889
- Epistylis regularis Dumas 1929
- Epistylis rhabdostyla Eismond 1895
- Epistylis rotatorium Kahl 1935
- Epistylis rotans Svec 1897
- Epistylis ringens Fromentel ?
- Epistylis solitaria Dumas 1929
- Epistylis tornatilis Dumas 1929
- Epistylis urceolata Stiller 1935
- Epistylis tubificis D'Udekem 1864
- Epistylis zschokkei Keiser 1921
- Epistylis arabica
- Epistylis arcuata Dumas 1930
- Epistylis autumnalis Stokes 1889
- Epistylis azelicola Dumas 1929
- Epistylis barbata Gourret & Roeser 1886
- Epistylis cerviciformis Dumas 1930
- Epistylis chrysemydis Bishop & Jahn 1941
- Epistylis collariata Dumas 1929
- Epistylis complanata Dumas 1929
- Epistylis constricta Kellicott 1855
- Epistylis crassicolis Stein 1867
- Epistylis corymbosus Dumas 1937
- Epistylis coronata Nusch 1970
- Epistylis d'udekemi Kahl 1935
- Epistylis digitalis Linnaeus 1758
- Epistylis entzii Stiller 1935
- Epistylis elongata Stokes 1889
- Epistylis dupla Dumas 1929