Species (1.675)
- Trichoda succisa Müller 1786
- Trichoda uvula Müller
- Trachelostyla spirotrichoides Gellert 1956
- Trichoda gibba Müller 1786
- Trichoda lyncaster Müller 1776
- Trichoda lynceus Müller 1773
- Tricholeptus aculeatus Fromentel 1874
- Trichotaxis aeruginosa Foissner 1980
- Trachelochaeta bryophila Sramek-Husek 1954
- Trachelochaeta gonostomoida Hemberger 1985
- Trichotaxis caudata Ehrenberg 1838
- Trichototaxis aeruginosa Foissner 1980
- Trichototaxis pulchra Borror 1972
- Trichototaxis rubentis Sarmiento & Guerra 1960
- Trichototaxis villaensis Sarmiento & Guerra 1960
- Trichototaxis stagnatilis Stokes 1891
- Tricoronella pulchra Blatterer & Foissner 1988
- Trachelostyla affine
- Trachelostyla bryonicolum Gellert 1956
- Trachelostyla caudata Kahl 1932
- Trachelostyla canadensis Buitkamp & Wilbert 1974
- Trachelostyla ciliophorum Gellert 1956
- Urostyla intermedia Bergh 1889
- Urostyla marina Kahl 1932
- Urostyla rubra Andrussowa 1886
- Urostyla sphagni Stokes 1886
- Urostyla trichogaster Stokes 1885
- Urostyla vernalis Stokes 1894
- Urostyla urostyla Claparède & Lachmann 1858
- Urostyla weissei Stein 1859
- Urostyla viridis Stein 1859
- Uroleptoides qingdaoensis Song & Wilbert 1989
- Uroleptopsis multiseta Dragesco 1970
- Uroleptus americanus Calkins 1919
- Uroleptus longicaudatus Stokes 1886
- Uroleptus mobilis Engelmann 1862
- Uroleptus musculus Müller 1786
- Uroleptus muscorum Kahl 1932
- Uroleptus notabilis Foissner 1982
- Uroleptus natronophilus Dietz 1965
- Uroleptus novitas Horvath 1933
- Uroleptus opisthobolus Stokes 1886
- Uroleptus sphagni Stokes 1886
- Uroleptus violaceus Stein 1859
- Urosoma acuminata Stokes 1887
- Urosoma caudata Stokes 1887
- Urosoma ambigua Dragesco & Dragesco-Kernéis 1986
- Urosoma cienkowski Kowalewski 1882
- Urosoma cienkowskii Kowalewski 1882
- Urosoma gigantea Horváth 1933
- Urosoma longicirrata Kahl 1932
- Urosoma karinae Foissner 1987
- Urosoma macrostyla Wrzesniowski 1870
- Urosoma octonucleata Berger & Foissner 1989
- Urosoma planctonicum sensu Wilbert 1969
- Urosomoida agiliformis Foissner 1982
- Urosomoida agilis Engelmann 1862
- Urosomoida dorsiincisura Foissner 1982
- Urosomoida antarctica Foissner 1996
- Urosomoida minima Hemberger 1985
- Urosomoida n.sp.
- Urosomoida granulifera Foissner 1996
- Urosomoida perthensis Foissner & O'Donoghue 1990
- Urospina bicaudata Gelei 1944
- Urostrongylum caudatum Kahl 1932
- Uroleptoides atypicus Hemberger 1985
- Uroleptoides binucleatus Hemberger 1985
- Uroleptoides caudatus Hemberger 1985
- Uroleptoides kihni Wenzel 1953
- Uroleptoides vitiphilus Foissner 1987
- Uroleptoides quadrinucleatus Foissner 1984
- Urospinula bicaudata Corliss 1960
- Urostrongylum contortum Kahl 1932
- Urostyla brachytona Stokes 1886
- Urostyla caudata Stokes 1886
- Urostyla chlorelligera Foissner 1980
- Urostyla concha Entz 1884
- Urostyla dispar Kahl 1932
- Urostyla elongata Stokes 1891
- Urostyla flavicans Wresniowski 1870
- Urostyla fulva Stokes 1891
- Urostyla gigas Stokes 1886
- Urostyla gracilis Entz 1884
- Urostyla grandis Ehrenberg 1830
- Urostyla limboonkengi Wang & Nie 1932
- Urostyla multipes Claparède & Lachmann 1858
- Urostyla muscorum Kahl 1932
- Urostyla paragrandis Wang 1930
- Uroleptus agilis Engelmann 1862
- Uroleptus contortus Gelei 1954
- Uroleptus caudatus Ehrenberg 1833
- Uroleptus dispar Stokes 1886
- Uroleptus gallina Müller 1786
- Uroleptus gibbus Müller 1786
- Uroleptus hospes Ehrenberg 1831
- Uroleptus halseyi Calkins 1929
- Uroleptus kahli Buitkamp 1977
- Uroleptus humicola Gellert 1956
- Uroleptus lacteus Kahl 1932
- Uroleptus lamella Ehrenberg 1831