Species (15.149)
- Anoplophrya almae
- Anoplophrya branchiarum
- Anoplophrya complanata
- Anoplophrya clavata
- Anoplophrya cochleariformis
- Anoplophrya convexa
- Anoplophrya foetidae
- Anthurceolaria karyolobia Hirshfield ß
- Apiosoma amoeba
- Apiosoma alburni
- Apiosoma baikalensis
- Apiosoma campanulata
- Apiosoma basiramosa
- Apiosoma baueri
- Apiosoma carpelli
- Apiosoma baninae
- Apiosoma cotti
- Apiosoma compacta
- Apiosoma doliaris
- Apiosoma dallii
- Apiosoma extensa
- Apiosoma gigantea
- Apiosoma gasterostei
- Apiosoma microstyla
- Apiosoma miniciliata
- Apiosoma minuta
- Apiosoma nasalis
- Apiosoma minimicronucleata
- Arachnidium bipartita
- Arachnella bipartita
- Arachnidium bipartitum
- Arachnidium convolutum
- Cyclidium arboreum
- Cyclidium abscissum
- Cyclidium arborum
- Cyclidium bergeri
- Cyclidium bulla
- Cyclidium chlorelligera Lepsi 1957
- Cyclidium claprèdi
- Cyclidium citrulus Cohn 1866
- Cyclidium curvata
- Cyclidium cytrulus
- Cyclidium crassum
- Cyclidium distortum
- Cyclidium hepatrichum Schewiakoff 1893
- Cyclidium limetosum
- Cyclidium glaucoma Schewiakoff 1889 ssp. elongatum
- Cyclidium nucleus
- Cyclidium setiger
- Lacrymaria acuta Vuxanovici 1959 ssp. robusta
- Cyclidium saltans
- Cyclidium sphagnetorum Sramek-Husek
- Cyclidium stercoris Powers 1935
- Cyclidium citrullus Cohn 1866
- Cyclochaeta astericola
- Cyclophrya katharinae
- Cycloposthium elongatum
- Cycloposthium ishikawai
- Cycloposthium caudatum
- Cycloposthium lenticularis
- Cycloposthium minutum
- Cyclostipes spiosomae
- Coxliella helix
- Coxliella meunieri
- Coxliella intermedia
- Coxliella minor
- Coxliella oviformis
- Coxliella pelagica
- Coxliella tubularis
- Coxliella pseudannulata
- Craspedomyoschiston sphaeromae Precht 1935
- Craspedophrya rotunda Hentschel 1916
- Craterella albescens
- Craterella pacifica
- Craterella atlantica
- Craterella amilla
- Craticuloscuta gigas
- Crebricoma kozloffi
- Cryptopharynx mauritanicus Dragesco 1965
- Cryptopharynx setigerum ssp. setigerum
- Cryptopharynx setigerum Kahl
- Ctedoctema acanthocryptum Stokes 1884
- Ctedoctema wilberti Small & Lynn 1985
- Cristigera hammeri
- Cryptochilum echinometris
- Cryptochilum sigmoides
- Cryptochilidium polynucleatum
- Cryptochona tumida
- Cothurnia amoyensis
- Cothurnia amphicteis
- Cothurnia antarctica
- Cothurnia anomala
- Cothurnia aplatita
- Cothurnia apseudophila
- Cothurnia arenata
- Cothurnia asymmetrica
- Cothurnia asimmetrica
- Cothurnia bavarica
- Cothurnia auriculata
- Cothurnia boeckii