Species (22.489)
- Discolithus fimbriatus
- Discolithus panarium
- Discolithus ocellatus
- Discolithus pectinatus
- Discolithus planus
- Discolithus rimosus
- Discolithus pulcher
- Discolithus punctosus
- Discolithus versus
- Discolithus solidus
- Discophrya collini
- Discontinus dispar
- Discophrya cothurnata
- Discophrya elongata
- Discophrya cylindrica
- Cyclidium elongatum Schewiakoff 1889
- Discophrya lata
- Discophrya planarium
- Discophrya spatulata
- Discophrya scyphostyla
- Discophryson liberus Jankowski 1985
- Discophrya steinii
- Discorbina baconica
- Cyclospora cayetanensis
- Discorbina orbicularis
- Dileptus aculeatus Dragesco 1960
- Dileptus caudatus
- Dileptus dimorphus Wang 1940
- Acineta lingulifera
- Dileptus fasciola
- Dileptus gabonensis Dragesco 1963
- Dileptus piscis
- Dileptus proboscidaeus
- Dileptus proboscideus Lepsi 1957
- Dileptus robustus Vuxanovici 1959
- Cytauxzoon felis
- Dileptus stramphii
- Dileptus tracheloides Zacharias 1888
- Dileptus thononensis Dragesco 1960
- Diplodinium triacanthum
- Diplodinium rostratum
- Diplodinium unifasciculatum
- Diplodinium vortex
- Disematostoma bütschli Lauterborn 1894
- Disematostoma bütschlii Lauterborn 1894
- Pyxidium invaginatum ssp. invaginatum
- Disematostoma tetraedrica Faure-Fremiet 1924
- Disoma bicolor
- Disteria monostyla
- Doyerius marsupius
- Cryptosporidium nasorum
- Drepanena falcata
- Drepanoceras dentata Mermod
- Hepatazoon muris
- Euplotes iliffei
- Frenkelia microti
- Cryptosporidium meleagridis
- Enchelis epistomium
- Enchelis mutans
- Enchelis palea
- Enchelis ovulum
- Enchelis papula
- Enchelis pyrum
- Enchelis punctifera
- Enchelis pulvisculus
- Enchelis scytale
- Enchelis seminulum
- Enchelis spathula Müller 1773
- Enchelis tremula
- Enchelyodon multinucleata Dragesco & Dragesco-Kerneis 1979
- Cryptosporidium muris
- Enchelyodon nodosa Berger, Foissner & Adam 1984
- Enchelys brunnea
- Enchelyodon vermiformis Dragesco 1970
- Enchelys coleps
- Enchelys corrugata
- Enchelys gigas Stein 1859
- Enchelys discolor
- Enchelys ovata
- Enchelys ovum Groliere 1977
- Enchelys nodulosa
- Enchelys papa
- Enchelys polyphysa
- Enchelys rostrata
- Enchelys puppa
- Enchelys pyriformis
- Enchelys sub-angulata
- Enchelys subangulata
- Enchelys tencoranica
- Enchyleodon pellucidus
- Ehrenbergius deformis
- Karyloysus lacertae
- Elphidium advenum Cushman
- Elphidium cryptostomum
- Elphidium flexuosum
- Elphidium reginum d'Orbigny 1846
- Electostoma vastum Bock 1952
- Ellipsoidella cuneiformis
- Eccliffa albina
- Ecclissa hermanni