Species (15.149)
- Cothurnia fusiformis Gourret & Roeser 1886
- Cothurnia harpactici Kahl 1933
- Cothurnia gracilis Kent 1882
- Cothurnia havniensis Ehrenberg 1838
- Cothurnia imberbis Ehrenberg 1831
- Cothurnia imberis Hemprich & Ehrenberg 1831
- Cothurnia inflata Stokes 1893
- Cothurnia irregularis Kent 1882
- Cothurnia lapponum Penard 1922
- Cothurnia limnoriae Dons 1928
- Cothurnia longipes sensu Voigt 1902
- Cothurnia marina Andrussowa 1886
- Cothurnia maritima Ehrenberg 1838
- Cothurnia minutissima Penard 1914
- Cothurnia nebaliae Dons 1928
- Cothurnia oblonga Kahl 1935
- Cothurnia ovalis Kahl 1933
- Cothurnia operculata Gruber 1879
- Cothurnia ovata Fromentel 1874
- Cothurnia pediculata Dumas 1930
- Cothurnia pedunculata Dons 1918
- Cothurnia plectostyla Stokes 1885
- Cothurnia poculum Kahl 1933
- Cothurnia propinqua Kahl 1933
- Cothurnia sieboldi Stein ?
- Cothurnia spissa Fromentel 1874
- Cothurnia spinosa Labbe 1895
- Cothurnia sinuata Kahl 1933
- Cothurnia variabilis Kellicott 1883
- Cothurnia vas Swarczewsky 1930
- Cothurnia voigti Kahl 1935
- Cothurnia vorticelloides Dumas 1929
- Cyclidium oblongum Kahl 1931
- Cyclidium oligotrichum Kahl 1928
- Cyclidium opisthostoma Grandori & Grandori 1934
- Cyclidium pediculus Müller 1773
- Cyclidium paucisetum Lepsi 1926
- Cyclidium planum Hemprich & Ehrenberg 1831
- Cyclidium pellucidum Kahl 1931
- Cyclidium similans Kahl 1928
- Cyclidium plouneouri Dragesco 1963
- Cyclidium singulare Kahl 1926
- Cyclidium terricola Kahl 1931
- Cyclidium veliferum Kahl 1933
- Cyclidium spirale Kahl 1926
- Cyclidium versatile Penard 1922
- Cyclidium viride Fromentel 1876
- Cyclochaeta asterisci Gruber 1884
- Cyclochaeta korschelti Zick 1928
- Cyclochaeta scorpaenae Robin 1879
- Cyclochaeta domergui Wallengren 1897
- Cyclochaeta ophiotricis Fabre-Domergue 1888
- Cyclochaeta spongillae Jackson 1875
- Cyclochaeta serpularum Fabre-Domergue 1888
- Cyclocyrrha asterisci Fabre-Domergue 1888
- Cyclocyrrha ophiothricis Fabre-Domergue 1888
- Cyclodonta bipartita Stokes 1885
- Cyclogramma lateritia Claparède & Lachmann 1859
- Cyclogramma membranella Thompson 1972
- Cyclogramma minima Minkiewicz 1899
- Cyclogramma protectissima Penard 1922
- Cyclogramma sorex Penard 1922
- Cyrtohymena candens Gellert 1942 ssp. depressa
- Cyrtohymena citrina Berger & Foissner 1987
- Cyrtohymena gracilis Kahl 1932
- Cyrtohymena dubia Gellert 1956
- Cyrtohymena inquieta Stokes 1887
- Cyrtohymena muscorum Kahl 1932
- Cyrtohymena primicirrata Berger & Foissner 1987
- Cyrtohymena granulata Kahl 1932
- Cyrtohymena tetracirrata Gellert 1942
- Cyrtohymena sphagnicola Foissner 1989
- Cyrtohymena quadrinucleata Dragesco & Njiné 1971
- Cyrtohymenostoma gallinulae Das, Chatterjee & Ray 1969
- Cyrtolophosis colpidiformis Foissner 1993
- Dragescoa mirabilis Jankowski 1974
- Drepanomonas bispinifera nonZR
- Drepanina falcata Savi 1913
- Drepanomonas borzai Lepsi 1948
- Drepanomonas exigua Foissner 1999 ssp. bidentata
- Drepanomonas muscicola Foissner 1987
- Drepanomonas lunaris Foissner 1979
- Drepanomonas obtusa Penard 1922
- Drepanomonas pauciciliata Foissner 1987
- Drepanomonas simulans Kahl 1926
- Drepanomonas revoluta Penard 1922
- Drepanomonas sphagni Kahl 1931
- Drilocineta libyodrili Puytorac 1958
- Durchoniella dodecaceriae Puytorac & Schrevel 1965
- Durchoniella cirratuli Puytorac 1954
- Dysteria aculeata Claparède & Lachmann 1859
- Dysteria angustata Claparède & Lachmann 1859
- Dysteria balani Jankowski 1967
- Dysteria calkinsi Kahl 1931
- Dysteria brasiliensis Cunha, Faria & Pinto 1928
- Dysteria compressa Gourret & Roeser 1886
- Dysteria crassipes Claparède & Lachmann 1859
- Dysteria cristata Gourret & Roeser 1886
- Dysteria distyla Maskell 1887
- Dysteria duplopharynx Lepsi 1922