Species (565)
- Climacostomum spirigera Ehrenberg 1833
- Condylostoma rostratum Kahl 1926
- Condylostoma ovum Kahl 1926
- Spirostomum ambiguum Roux ssp. major
- Spirostomum ambiguum Kahl 1932 ssp. inflatum
- Spirostomum teres ssp. teres
- Spirostomum teres Kahl 1926 ssp. crassum
- Condylostoma caudatum sensu Spiegel 1926
- 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
- Electostoma vastum Bock 1952
- 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
- Anigsteinia clarissima Isquith 1968
- Metopus setosus Kahl 1927
- Pseudoblepharisma tenue Kahl 1927 ssp. tenue
- Pseudoblepharisma tenuis Kahl 1927
- Predurostyla arenarium
- Procondylostoma ancestralis Villeneuve-Brachon 1940
- Metopus contortus Quennerstedt 1867
- Metopus inversus Jankowski 1964
- Anigsteinia clarissimum
- 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 acuta Dragesco 1960
- Condylostoma enigmatica Dragesco 1954
- Condylostoma kahlii Dragesco 1960
- Condylostoma minima Dragesco 1960
- Condylostoma kasymovi
- Condylostoma remanei Kahl 1932 ssp. remanei
- Condylostoma nigra Dragesco 1960
- Condylostoma vorticellina
- Condylostoma tenuis Fauré-Fremiet 1958
- Condylostomum patens
- Condylostomum patulum
- 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
- Condylostoma vorax
- Maristentor dinoferus Lobban, Schefter, Simpson...& Foissner 2002
- Spirostomum minus Foissner & Gschwind 1998 ssp. viride
- Spirostomum minus Roux 1901 ssp. minus
- Anigsteinia clarissima Anigstein 1912
- Kondylostoma patulum
- Kondylostoma marinum
- 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
- Predurostyla arenaria Spiegel 1926
- Procondylostoma ancestrale Villeneuve-Brachon 1940
- Condylostoma patense Bory 1824
- Hadziella zetae
- Spirostomum lanceolata Gruber 1884
- Spirostomum minor ssp. ambiguum
- Spirostomum yagiui Shigenaka
- Brachonella galeata Kahl 1927
- Brachonella galeatus
- Aduncuperistomatus tejerai Amaro & Sena 1967
- Pseudoblepharisma tenue ssp. chlorelligera