Species (527)
- Climacostomum spirigera Ehrenberg 1833
- Spirostomum ambiguum Roux ssp. major
- Spirostomum ambiguum Kahl 1932 ssp. inflatum
- Spirostomum teres ssp. teres
- Spirostomum teres Kahl 1926 ssp. crassum
- Spirostomum ambiguum Roux ssp. minor
- Spirostomum ephrussii
- Metopus jankowskii
- Pseudoblepharisma tenue ()
- Pseudoblepharisma tenue Kahl 1926
- Stentor elegans Fromentel 1876
- Brachonella mitriformis
- Bursaria spirigera Ehrenberg 1833
- Caenomorpha medusala Perty 1852
- Caenomorpha unserialis
- Folliculina möbiusi
- Folliculinopsis ampulla
- Folliculinopsis gunneri
- Folliculinopsis limnoriae
- Spirostomum virescens
- Spirostomum minor
- Spirostomum sempervirescens
- Stentor amthystinus Leidy 1880
- Stentor igneus Forbes 1891 ssp. fuliginosus
- Stentor mülleri
- Stentor roeselli
- Stentor röselii
- Metopus setosus Kahl 1927
- Metopus contortus Quennerstedt 1867
- Metopus inversus Jankowski 1964
- Nyctitherus velox
- Blepharisma undulans Suzuki 1954 ssp. americanum
- Blepharisma bimicronucleata
- Blepharisma parasalinarum Dragesco 1996
- Caenomorpha medusula Kahl 1927 ssp. lata
- Climacostomum virens Ehrenberg 1833 ssp. virens
- Conchophthirius caryoclada Kidder 1933
- Conchophthirus difformis
- Conchophthirus striatus
- Condylostoma kahlii Dragesco 1960
- Condylostoma minima Dragesco 1960
- Metopus recurvatus ssp. pusillus
- Blepharisma lateritium
- Blepharisma clarissima Kahl 1928
- Blepharisma clarissimum Kahl ssp. arenicola
- Blepharisma lateritia ssp. minima
- Blepharisma melana Borror 1963
- Blepharisma multinucleata Dragesco 1960
- Blepharisma ovata
- Blepharisma vitraeum
- Blepharisma salinarium Florentin 1899
- Gyrocoris oxura
- Maristentor dinoferus Lobban, Schefter, Simpson...& Foissner 2002
- Spirostomum minus Foissner & Gschwind 1998 ssp. viride
- Spirostomum minus Roux 1901 ssp. minus
- Anigsteinia clarissima Anigstein 1912
- Lagotia producta
- Condylostomides tardus Penard 1922
- Caenomorpha medusula ssp. dentata
- Blepharisma americana Suzuki 1954
- Condylostoma longicaudata Dragesco 1996
- Heterostentor coeruleus Song & Wilbert 2002
- Condylostomides trinucleatus Foissner, Agatha & Berger 2002
- Condylostomides etoschensis Foissner, Agatha & Berger 2002
- Conchophthirus metchnicoffi
- Conchophthirus mytili Morgan 1925
- Spirostomum filum Ehrenberg 1833
- Hadziella zetae
- Spirostomum lanceolata Gruber 1884
- Spirostomum minor ssp. ambiguum
- Spirostomum yagiui Shigenaka
- Brachonella galeata Kahl 1927
- Brachonella galeatus
- Aduncuperistomatus tejerai Amaro & Sena 1967
- Blepharisma tenue
- Spirostomum teres ssp. caudatum
- Conchopthirius mytili Morgan 1925
- Conchophthirius antedonis
- Conchophthirius steenstruppi Stein 1861
- Conchophthirus caryoclada Kidder 1933
- Spirostomum minor Roux 1901 ssp. minor
- Spirostomum chlorelligera Foissner ß
- Climacostomum diedrum Faure-Fremiet 1924
- Climacostomum emarginatum Stokes 1885
- Climacostomum minimum Foissner 1980
- Climacostomum gigas Meunier 1907
- Climacostomum patulum
- Climacostomum stepanowii Entz 1901
- Compactum lateritium Hirshfield, Isquith & Bhandary 1965
- Conchophthirius anodontae Stein 1861
- Conchophthirius metchnikoffi Certes 1891
- Conchophthirius mytilis Morgan 1925
- Conchophthirus anodontae Ehrenberg 1838
- Conchophthirus acuminatus Claparède & Lachmann 1858
- Conchophthirus antedonis Andre 1910
- Conchophthirus curtus Engelmann 1861
- Conchophthirus davidoffi Chatton 1911
- Condylostoma circumpedatum Meunier 1907
- Condylostoma curvum Burkovsky 1970
- Condylostoma enigmaticum Dragesco 1954