- Oxytricha aeruginosa Wrzesniowskiego, 1866
  - Oxytricha alfredi Berger, 1999
  - Oxytricha alfredkahli Foissner, 1987
  - Oxytricha atypica sp. nov.[1]
  - Oxytricha auripunctata Blatterer & Foissner, 1988
  - Oxytricha balladyna Song & Wilbert, 1989
  - Oxytricha bimembranata Shibuya, 1929
  - Oxytricha chlorelligera Kahl, 1932
  - Oxytricha crassistilata Kahl, 1932
  - Oxytricha discifera Kahl, 1932
  - Oxytricha durhamiensis Berger, 1999
  - Oxytricha elongata (Smith, 1897) Kahl, 1932
  - Oxytricha enigmatica Dragesco & Dragesco-Kernéis, 1986
  - Oxytricha euglenivora Kahl, 1932
  - Oxytricha fallax Stein, 1859
  - Oxytricha faurei Tucolesco, 1962
  - Oxytricha fromenteli Foissner, 1987
  - Oxytricha geleii (Wilbert, 1986) Berger, 1999
  - Oxytricha granulifera Foissner & Adam, 1983
  - Oxytricha granulosa Schmitz, 1986
  - Oxytricha halophila Kahl, 1932
  - Oxytricha hymenostoma Stokes, 1887
  - Oxytricha islandica Berger & Foissner, 1989
  - Oxytricha kahlovata Berger, 1999
  - Oxytricha lanceolata Shibuya, 1930
  - Oxytricha longa Gelei & Szabados, 1950
  - Oxytricha longicirrata Kahl, 1932
  - Oxytricha longigranulosa Berger & Foissner, 1989
  - Oxytricha longissima Dragesco & Njine, 1971
  - Oxytricha matritensis Ramirez-Montesinos & Perez-Silva, 1966
  - Oxytricha minor (Maskell, 1887) Kahl, 1932
  - Oxytricha monspessulana (Chatton & Séguéla, 1940) Borror, 1972
  - Oxytricha multipes Claparède & Lachmann, 1858
  - Oxytricha multiseta Dragesco, 1966
  - Oxytricha nauplia Berger & Foissner, 1987
  - Oxytricha opisthomuscorum Foissner, Blatterer, Berger & Kohmann, 1991
  - Oxytricha ottowi Foissner, 1996
  - Oxytricha oxymarina Berger, 1999
  - Oxytricha parahalophila (Wang & Nie, 1935) Berger, 1999
  - Oxytricha parallela Engelmann, 1862
  - Oxytricha parallelis Englemann, 1862
  - Oxytricha pernix Wrześniowski, 1877
  - Oxytricha procera Kahl, 1932
  - Oxytricha proximata Shibuya, 1930
  - Oxytricha pseudofurcata Berger, 1999
  - Oxytricha pseudofusiformis Dragesco & Dragesco-Kernéis, 1986
  - Oxytricha pseudosimilis Hemberger, 1985
  - Oxytricha quadricirrata Blatterer & Foissner, 1988
  - Oxytricha rubripuncta Berger & Foissner, 1987
  - Oxytricha saltans (Cohn, 1866) Rees, 1881
  - Oxytricha saprobia Kahl, 1932
  - Oxytricha setigera Stokes, 1891
  - Oxytricha similis Engelmann, 1862
  - Oxytricha siseris Vuxanovici, 1963
  - Oxytricha sphagni Kahl, 1932
  - Oxytricha tenella Song & Wilbert, 1989
  - Oxytricha tricornis Milne, 1886
  - Oxytricha variabilis Grolière, 1975
  - Oxytricha acuminata Dumas, 1930 (taxon inquirendum)
  - Oxytricha acuminata Mahajan, 1977 (taxon inquirendum)
  - Oxytricha acuminata Vuxanovici, 1963 (taxon inquirendum)
  - Oxytricha ambigua Dujardin, 1841 (taxon inquirendum)
  - Oxytricha anca Dumas, 1930 (taxon inquirendum)
  - Oxytricha arcuata Dumas, 1930 (taxon inquirendum)
  - Oxytricha barbula Dumas, 1930 (taxon inquirendum)
  - Oxytricha becciformis Dumas, 1929 (taxon inquirendum)
  - Oxytricha bilobata Fromentel, 1876 (taxon inquirendum)
  - Oxytricha cornipes Dumas, 1929 (taxon inquirendum)
  - Oxytricha cornuta Dumas, 1929 (taxon inquirendum)
  - Oxytricha curta Dumas, 1929 (taxon inquirendum)
  - Oxytricha cypris Dumas, 1929 (taxon inquirendum)
  - Oxytricha decumana Perty, 1852 (taxon inquirendum)
  - Oxytricha deformis Fromentel, 1876 (taxon inquirendum)
  - Oxytricha dubia O. F. M. - Kovaleva & Golemansky, 1979 (taxon inquirendum)
  - Oxytricha dujardiniana Diesing, 1866 (taxon inquirendum)
  - Oxytricha ehrenbergiana Diesing, 1866 (taxon inquirendum)
  - Oxytricha ephippioïdes Dumas, 1929 (taxon inquirendum)
  - Oxytricha exociformis Dumas, 1930 (taxon inquirendum)
  - Oxytricha fimbriata Dumas, 1930 (taxon inquirendum)
  - Oxytricha formosa Alekperov, 1984 (taxon inquirendum)
  - Oxytricha furcatus Smith, 1897 (taxon inquirendum)
  - Oxytricha galeata Dumas, 1929 (taxon inquirendum)
  - Oxytricha gyrinioïdes Dumas, 1929 (taxon inquirendum)
  - Oxytricha hengshanensis Liu et al., 1992 in Shen, Liu, Song & Gu, 1992 (taxon inquirendum)
  - Oxytricha immemorata Alekperov, 1984 (taxon inquirendum)
  - Oxytricha incrassata Dujardin, 1841 (taxon inquirendum)
  - Oxytricha labiata Dumas, 1930 (taxon inquirendum)
  - Oxytricha labiata Fromentel, 1876 (taxon inquirendum)
  - Oxytricha lacerata Dumas, 1929 (taxon inquirendum)
  - Oxytricha lacrimula Dumas, 1929 (taxon inquirendum)
  - Oxytricha lata Sterki, 1878 (taxon inquirendum)
  - Oxytricha lingua Dujardin, 1841 (taxon inquirendum)
  - Oxytricha longipes Dumas, 1930 (taxon inquirendum)
  - Oxytricha luteolucens Dumas, 1937 (taxon inquirendum)
  - Oxytricha merula Fromentel, 1876 (taxon inquirendum)
  - Oxytricha monstrosa Vuxanovici, 1963 (taxon inquirendum)
  - Oxytricha nova Klobutcher, Swanton, Donini & Prescott, 1981 (taxon inquirendum)
  - Oxytricha oblonga Dumas, 1929 (taxon inquirendum)
  - Oxytricha oblongatus Sharma, Sobti & Kathuria, 1986 (taxon inquirendum)
  - Oxytricha obtusa Dumas, 1930 (taxon inquirendum)
  - Oxytricha oltenica Lepsi, 1965 (taxon inquirendum)
  - Oxytricha ovalis Schmarda, 1854 (taxon inquirendum)
  - Oxytricha ovata Dumas, 1929 (taxon inquirendum)
  - Oxytricha pisciunculiformis Dumas, 1929 (taxon inquirendum)
  - Oxytricha pistilloides Dumas, 1929 (taxon inquirendum)
  - Oxytricha pleuronectes Dumas, 1929 (taxon inquirendum)
  - Oxytricha plicata Eichwald, 1852 (taxon inquirendum)
  - Oxytricha praeceps Dumas, 1930 (taxon inquirendum)
  - Oxytricha proboscis Dumas, 1930 (taxon inquirendum)
  - Oxytricha protensa Perty, 1852 (taxon inquirendum)
  - Oxytricha quadrinucleata Culberson, 1986 (taxon inquirendum)
  - Oxytricha quercineti Lepsi, 1948 (taxon inquirendum)
  - Oxytricha radians Dujardin, 1841 (taxon inquirendum)
  - Oxytricha rostrata Dumas, 1930 (taxon inquirendum)
  - Oxytricha saltans Vuxanovici, 1963 (taxon inquirendum)
  - Oxytricha stratiformis Dumas, 1930 (taxon inquirendum)
  - Oxytricha striata Schmarda, 1854 (taxon inquirendum)
  - Oxytricha subcylindrica Dumas, 1929 (taxon inquirendum)
  - Oxytricha tetranucleata Németh in Gelei, 1950 (taxon inquirendum)
  - Oxytricha truncata Vuxanovici, 1963 (taxon inquirendum)
  - Oxytricha viridis Fromentel, 1876 (taxon inquirendum)
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