Species (15.149)
- Trichopodiella pulex Deroux 1976
- Trichopus dysteria Claparède & Lachmann 1859
- Trichorhynchus erlangeri
- Trichorynchus erlangeri
- Trichorynchus tuamotuensis Balbiani 1887
- Trichotaxis aeruginosa Foissner 1980
- Trimyema echinometrae Groliere, Puytorac & Grain 1980
- Trimyema marina Kahl 1931
- Trimyema minuta Kahl 1931
- Trimyema pleurispiralis Borror 1972
- Tripalmaria dogieli Gassovsky 191?
- Trimyema shoalsia Nerad & Schaffer 1995
- Tripartiella copiosa Lom 1959
- Tripartiella globonuclea Lom 1963
- Tripartiella lata Lom 1963
- Tripartiella incissa Lom 1959
- Tripartiella melanogrammi Stein G. 1961
- Tripartiella rhombi Stein G. 1961
- Tripartiella obliqua Lom 1963
- Trithigmostoma bavariensis Kahl 1931
- Trachelocerca sulcata Kahl 1927
- Trachelocerca tenuissima Lepsi 1962
- Trachelocerca tenuicollis Quennerstedt 1867
- Trachelocerca tesselata Kahl 1933
- Trachelocerca viridis Ehrenberg 1833
- Trachelocerca variabilis Kovaleva 1966
- Trachelocerca trepida Kahl 1928
- Trachelochaeta bryophila Sramek-Husek 1954
- Trachelochaeta gonostomoida Hemberger 1985
- Trachelonema lanceolatum Raikov 1962
- Trachelonema binucleatum Agamaliev 1966
- Trachelonema grassei Dragesco 1960
- Trachelonema longicolle Dragesco 1960
- Trachelonema minimum Dragesco 1960
- Trachelonema oligostriatum Raikov 1962
- Trachelonema poljanskyi Raikov 1962
- Trachelonema sulcatum Kovaleva 1966
- Trachelophyllum apiculatum Perty 1852
- Trachelophyllum attenuatum Foissner 1983
- Trachelophyllum brachypharynx Levander 1894
- Trachelophyllum clavatum Stokes 1886
- Trachelophyllum chilense Bürger 1906
- Trachelophyllum curvicaule Dumas 1937
- Trachelophyllum exile Dumas 1937
- Trachelophyllum elegans Dumas 1930
- Trachelophyllum falciforme Penard 1922
- Trachelophyllum grande Dumas
- Trachelophyllum filum Dumas 1930
- Trachelophyllum parvum Dumas 1930
- Trachelophyllum lamella Blochmann 1895
- Trachelophyllum sigmoides Kahl 1926
- Trachelophyllum pusillum Perty 1852
- Trachelophyllum tachyblastum Stokes 1884
- Tracheloraphis africanus Dragesco 1965
- Trachelophyllum valkanovi Lepsi 1959
- Tracheloraphis drachi Dragesco 1960
- Tracheloraphis ditis Wright 1982
- Tracheloraphis dracontoides Bullington 1940
- Tracheloraphis gracilis Dragesco 1960
- Tracheloraphis fasciolatus sensu Dragesco 1960
- Tracheloraphis filum Dragesco & Dragesco-Kernéis 1986
- Tracheloraphis indistinctus Wright 1982
- Tracheloraphis kahli Raikov 1962
- Tracheloraphis lacteus Raikov & Kovaleva 1968
- Tracheloraphis marginatus Kahl 1935
- Tracheloraphis monokaryon Dragesco 1965
- Tracheloraphis niveus Wright 1982
- Tracheloraphis serratus Raikov & Kovaleva 1968
- Tracheloraphis phoenicopterus Cohn 1866
- Tracheloraphis remanei Dragesco 1960
- Tracheloraphis prenanti Dragesco 1960
- Tracheloraphis similis Raikov & Kovaleva 1968
- Trichodina steinii Claparède & Lachmann 1858
- Trichodina rhinobatae Van As & Basson 1996
- Trichodina urinicola Fulton 1923
- Trichodina tentaculata Ehrenberg 1831
- Trichodina vancouverense Laird 1961
- Trichodinella capri Duncan 1977
- Trichodinella subtilis Lom 1959
- Trichodoxa phalli Sirgel 1983
- Trichophrya viridis Dumas 1930
- Trichophysea sinuosa Shawahan, Johnson & Jahn 1947
- Trichopodiella dysteria Claparède & Lachmann 1859
- Trichopodiella elongata Deroux 1976
- Trichospira cincinnata Penard 1922
- Trichospira dextrorsa Roux 1899
- Trichotaxis caudata Ehrenberg 1838
- Trichotaxis aquarum Bürger 1906 ssp. dulcium
- Trichotaxis euplotes Dragesco 1960
- Trichotaxis crassa Claparède & Lachmann 1858
- Trichotaxis pulchra Borror 1972
- Trichotaxis fossicola Kahl 1932
- Trichotaxis multinucleatus Burkovsky 1970
- Trichotaxis rubentis Sarmiento & Guerra 1960
- Trichotaxis stagnatilis Stokes 1891
- Trichotaxis velox Quennerstedt 1869
- Trichotaxis villaensis Sarmiento & Guerra 1960
- Trichototaxis aeruginosa Foissner 1980
- Trichototaxis pulchra Borror 1972
- Trichototaxis rubentis Sarmiento & Guerra 1960