Species (1.195)
- Rhabdostyla patula Perty 1852
- Rhabdostyla porculus Penard 1922
- Rhabdostyla ringens sensu Fromentel ?
- Rhabdostyla sphaeroides Fromentel 1874
- Pyxidium asymmetricum Biczok 1956
- Pyxidium bosminae Kahl 1935
- Pyxidium collare Kahl 1935
- Pyxidium cothurnioides Kent 1881
- Pyxidium canthocampti Penard 1922
- Pyxidium curvicaule Penard 1922
- Pyxidium hebes Kellicott 1888
- Pyxidium fabrei Faure-Fremiet 1905
- Pyxidium henneguyi Faure-Fremiet 1905
- Pyxidium invaginatum Kahl 1935 ssp. muscorum
- Pyxidium nutans Stokes 1889
- Pyxidium tardigradum Van der Land 1964
- Pyxidium longicollum Biegel 1954
- Pyxidium urecolatum Stokes 1886
- Pyxidium vernale Stokes 1887
- Pyxicola affinis Kent 1882
- Pyxicola annulata Leidy 1882
- Pyxicola constricta Stokes 1884
- Pyxicola ligiae Cuenot 1811
- Pyxicola furcifer Kent 1882
- Pyxicola entzi Stiller 1931
- Pyxicola limbata Stiller 1922
- Pyxicola operculigera Kent 1882
- Pyxicola pyxidiformis D'Udekem 1862
- Pyxicola socialis Gruber 1879
- Pyxidium acaule Kahl 1935
- Pyxicola striata Kellicott 1884
- Pyxidium arboricola Biegel 1954
- Rhabdostyla sessilis Penard 1922
- Rhabdostyla vernalis Stokes 1887
- Scyphidia ambigua Penard 1922
- Scyphidia amoebea Grenfell 1884
- Scyphidia annulata Edmondson 1912
- Scyphidia clymenellae Shumway 1926
- Scyphidia constricta Stokes 1885
- Scyphidia discostyla Svec 1897
- Scyphidia fischeri Vayssière 1885
- Scyphidia hyalina Biegel 1954
- Scyphidia hydrobiae Kahl 1933
- Scyphidia indica Bhatia 1936
- Scyphidia limacina Müller 1773
- Scyphidia lumbriculi Penard 1922
- Scyphidia ovata Kellicott 1884
- Scyphidia patellae Cuenot 1891
- Scyphidia physarum Lachmann 1856
- Scyphidia rhizopoda Lepsi 1923
- Scyphidia terebellae Faure-Fremiet 1920
- Scyphidia variabilis Dons 1922
- Scyphidia scorpenae Fabre-Domergue 1888
- Spirochona tintinnabulum Kent 1881
- Spirochona tuba Swarczewsky 1928
- Sertularia polypina Linnaeus 1758
- Setonophrys tricorniculata Clamp 1991
- Setonophrys lingulata Kane 1965
- Spirochona anthus Swarczewsky 1928
- Spirochona brevis Jankowski 1973
- Spirochona elegans Swarczewsky 1928
- Spirochona elegantula Swarczewsky 1928
- Spirochona globulus Swarczewsky 1928
- Spirochona gemmipara Stein 185?
- Spirochona marina Jankowski 1973
- Spirochona gnathopodialis Jankowski 1973
- Spirochona patella Swarczewsky 1928
- Spirochona nebalina Kent 1881
- Spirochona halophila Matsudo & Mohr 1968
- Spirochona pusilla Swarczewsky 1928
- Spirochona scheuteni Stein 1854
- Spirochona scheutenii Kent, sensu 1881
- Spirochona simplex Swarczewsky 1928
- Telotrochidium cylindricum Foissner 1978
- Telotrochidium johanninae Faure-Fremiet 1950
- Stentor niger Müller 1773
- Telotrochidium elongatum Foissner 1975
- Thuricola folliculata Kent, sensu 1881
- Thuricola innixa Stokes 1885
- Thuricola kellicottiana Stokes 1887
- Thuricola obconica Kahl 1933
- Thuricola valvata Wright 1858
- Thuricola vasiformis Hammann 1952
- Telotrochidium nathei Gulati 1926
- Trichodina heterodentata Duncan 1977
- Trichodina labrorum Chatton 1910
- Trichodina patellae Cuenot 1891
- Trichodina polaridiae Fenchel 1965
- Trichoda grandinella Müller 1773
- Trichodina asterisci Gruber 1884
- Trichodina baltica Quennerstedt 1869
- Trichodina bidentata Fabre-Domergue 1888
- Trichodina decipiens Laird 1961
- Trichodina galyae Lom & Laird 1969
- Trichodina elizabethae Lom & Laird 1969
- Trichodina grandinella Müller 1773
- Trichodina jarmilae Lom & Laird 1969
- Trichodina mitra Siebold 1850
- Trichodina polycirra Lom 1961
- Trichodina scorpaenae Robin 1879