Species (22.489)
- Pseudokeronopsis decolor Wallengren 1900
- Euplotoides daidaleos
- Oxytricha echinata Claparède & Lachmann 1859
- Urostrongylum deflectum
- Moneuplotes cristatus
- Kerona depauperata Bory 1824
- Oxytricha discifera Kahl 1932
- Holosticha discocephalus Kahl 1932
- Euplotoides dogieli
- Euplotes dogieli
- Crossothigma dubium
- Holosticha dubium
- Paramecium dubium
- Stylonychia dupla
- Amphorella torulata
- Paruroleptus dubium
- Amphorella tetragona
- Amphorella oxyura
- Amphorella gracilis
- Amphorella intumescens
- Amphista acuta
- Amphorella trachelium
- Amphorella pachytoecus
- Amphorella pyramidata
- Himantopus corona Müller 1786
- Amphorella subulata ssp. edentata
- Anacharon gracilis Ito & Imai 2000
- Mesotricha echinata
- Anarma brevis
- Ancistrocoma pelseneeri ssp. pholadis
- Ancistrina ovata
- Stylonichia corniculata Dumas 1929
- Trichoda delphis
- Anglasia magdalenae Delphy 1936
- Keronopsis clavata Vuxanovici 1963
- Stylonychia clavata
- Oxytricha complanatus Stokes 1887
- Anoplophrya criodrili
- Chaetospira congregata
- Strongylidium contorta
- Strongylidium contorta
- Isosticha contractilis
- Chaetospira cornuta
- Trichoda crinita
- Oxytricha chilensis Bürger 1905
- Holosticha caudatus Stokes 1886
- Urosoma caudatum Stokes 1887
- Oxytricha chlorelligera Kahl 1932
- Holosticha coronata Gourret & Roeser 1888
- Neogeneia costata
- Strongylidium coronatum
- Aspidisca tetracirrata ssp. costata
- Stylonichia capucinus Dumas 1930
- Holosticha crassa Claparède & Lachmann 1858
- Moneuplotes balticus
- Euplotes balteata
- Oxytricha crassistillata Kahl 1932
- Aspidisca caspica
- Euplotes balteatus
- Stylonichia auriformis
- Anthochloe prosperinae Joseph 1882
- Paraholosticha arenivora
- Paraholosticha arenivora
- Euplotes crassus
- Holosticha annulata Kahl 1928
- Euplotoides amieti Dragesco 1970
- Stenotricha arenicola
- Euplotoides agamalievi
- Euplotes arenularum
- Euplotes crassus ssp. minor
- Aspidisca binucleata Kahl
- Stichotricha asensius
- Euplotes alatus
- Moneuplotes crassus Dujardin 1841
- Amphisiella arenicola
- Euplotes mutagens
- Causella shtekhovicensis Koshevoj 1987
- Celeritia globosa Tucolesco 1962
- Paruroleptus musculus Kahl 1932 ssp. simplex
- Holosticha musculus Kahl 1932
- Aspidisca minuta
- Pseudokeronopsis multiplex
- Euplotes minutus
- Holosticha multinucleata Maupas 1883
- Tachysoma monstrosa
- Paradiophrys multinucleata
- Paradiophrys multinucleata
- Pseudokeronopsis multinucleata Maupas 1883
- Chaenia ponticum Lepsi 1926
- Chlamydodontopsis bengalensis
- Holosticha micans
- Laurentia monilata Dragesco & Njiné 1971
- Euplotes modunensis
- Cichlidotherus meanjae Affa'a 1989
- Moneuplotes minuta Yocum 1930
- Oxytricha mirabilis Stokes 1887
- Cinetozona pyriformis Olmo, Tellez & Esteban 1998
- Holosticha milnei Kahl 1932
- Holosticha minima
- Euplotes minima