Species (22.489)
- Dictyocysta fundlandica
- Dictyotidium polygonium
- Dictyotidium polosymmetrium
- Dallasia frontonia
- Deflandrella tenuis
- Deflandronella veracruzana Trejo 1972
- Deflandronella tenuis
- Daturellina costata
- Daturellina convexa
- Daturellina contracta
- Daturellina zetica Radoicic 1959
- Daurotheca ussurina
- Daurotheca tespa
- Daurotheca transoceanica
- Oxitricha joblottii Bory 1824
- Dendrosoma gammari
- Dendrosomides nymphoni
- Dendrosoma astaci
- Dendrosomides populiformis
- Dentalina botuliformis
- Dentalina cylindroides
- Dentalina doliiformis
- Dentalina distincta
- Dentalina ectadia
- Dentalina ejuncida
- Dentalina exilis
- Dentalina hollandica
- Dentalina fibula
- Dentalina expansa
- Dentalina intermedia
- Dentalina liassica
- Dentalina lorneiana
- Dentalina matulina
- Dentalina monile
- Dentalina mutabilis
- Dentalina nana
- Dentalina oolithica
- Dentalina nodigera
- Dentalina parvula
- Dentalina planata
- Dentalina paulocamerata
- Dentalina pseudochrysalis
- Diceras arietinum
- Diceras viridans
- Dicontophrya rara
- Dictyocoleps elongatus
- Dictyocoleps hirtus
- Didinium minimum
- Didinium balbiani Fabre-Domergue 1888 ssp. balbiani
- Didinium balbianii
- Didinium nasuta Müller 1773
- Dinophrya lieberkühnii
- Diophrys appendiculatus
- Diophrys multicirratus
- Diophrys magnus
- Diophrys pentacirratus
- Diophrys norwegicus
- Diophrys quadricaudatus
- Diophrys scutioides
- Caryospora bigenetica
- Diplodinium cattanei
- Diplodinium caudatum
- Diplodinium crista-galli
- Diplodinium denticulatum
- Diplodinium florentinii
- Diplodinium maggii
- Holosticha heterofoissneri Hu & Song 2001
- Diplodinium diacanthum
- Diplodinium magii
- Diplodinium uncinatum
- Euplotes inkystans
- Diplomastix dahlii
- Diplolophus caudatum
- Sarcocystis hominis
- Discacineta micraster Penard 1914
- Discephelota gigantea Noble 1929
- Discorbina obtusa
- Discorbina parisiensis
- Discorbina tabernacularis
- Discorbina turbo
- Discorbis araucanus
- Discorbis obtusus Marks 1951
- Discorbis pileolus
- Adelina tribolii
- Disteria lanceolata
- Klossia helicina
- Cladotricha koltzowii ssp. pisciformis
- Dileptus grandis Dragesco 1963
- Dileptus folium
- Dileptus granulosus
- Dileptus gallina
- Dileptus massutti Kahl 1933
- Dileptus multinucleatus Vuxanovici 1959
- Dileptus ovalis Vuxanovici 1959
- Dileptus musculus
- Dileptus phoenicopterus
- Discolithina numerosa
- Discolithus distinctus
- Discolithus duocavus
- Discolithus exilis