Species (22.489)
- Platyamoeba stenopodia Page 1969
- Chlorangium stentorinum Ehrenberg ()
- Anisonema striatum Klebs ()
- Amphitrema stenostomum
- Euglena proxima Dangeard ()
- Arcella pseudarcella
- Antarcella pseudarcella Penard 1917
- Euglypha pseudociliata Chardez
- Bullinularia pulchella Schönborn
- Arcella artocrea ssp. artocrea
- Arcella discoides ssp. discoides
- Arcella hemisphaerica Perty 1852 ssp. hemisphaerica
- Glenodinium pulvisculus Ehrenberg ()
- Scytomonas pusilla Stein ()
- Plagiopyxis pusilla Bonnet 1961
- Cyclopyxis puteus Thomas 1960
- Bodo putrinus Stokes ()
- Thecamoeba quadrilineata Carter 1856
- Dimastigamoeba radiata Klebs ()
- Spongylomorum quarternarium Ehrenberg ()
- Chrysamoeba radians Klebs ()
- Mastigella radicula Moroff ()
- Cercobodo radiatus Klebs ()
- Heleopera rectangularis Bonnet 1966
- Bodo repens Klebs ()
- Codonosigopsis robini Senn ()
- Leptomyxa reticulata Goodey 1914
- Mallomonas reptans Stokes ()
- Tetramitus robustus Szabados ()
- Pocheina rosea Cienkowski 1873
- Oikomonas rostrata Kent ()
- Plagiopyxis rostrata Bonnet
- Tetramitus rostratus Perty 1852
- Vahlkampfia russelli Singh 1952
- Bodo saltans Ehrenberg 1831
- Parapolytoma satura Jameson ()
- Platyamoeba schaefferi Singh & Hanumaiah 1979
- Assulina scandinavica Penard 1890
- Nitzschia sublinearis
- Carteria scherffeli Szabados ()
- Arcella rotundata ssp. rotundata
- Sainouron oxu Sandon ()
- Euglena oxyuris Schmarda ()
- Paraquadrula pachylepis Bonnet 1959
- Chloromonas palmelloides Broady ()
- Multicilia palustris Penard ()
- Polytoma papillatum Pascher ()
- Plagiopyxis parvoblonga Bonnet
- Bodo parvus Nägler ()
- Penardochlamys patella
- Pseudochlamys patella
- Sappinia pedata Dangeard 1896
- Ellipsopyxis pauliani Bonnet 1965
- Nitzschia microcephala
- Ochromonas mutabilis Klebs ()
- Penardia mutabilis Cash 1904
- Dimorpha mutans Gruber ()
- Deuteramoeba mycophaga Pussard, Alabouvette, Lemaitre & Pons 1980
- Difflugia nana Couteaux
- Rhynchomonas nasuta Stokes ()
- Bullinularia navicula Bonnet
- Corythion nebeloides Bonnet
- Mastigella nitens Penard ()
- Prowazekia ninae-kohlyakimov Yakimoff ()
- Guttulinopsis nivea Raper, Worley & Kessler 1977
- Proplagiopyxis nuda Schönborn
- Tetramitus pyriformis Klebs 1893
- Phacus pyrum Ehrenberg ()
- Salpingoeca pyxidium Kent ()
- Oikomonas quadrata Kent ()
- Chromulina rosanoffi Worodin ()
- Acrasia rosea Olive & Stoianovitch 1960
- Bodo rostratus Kent ()
- Gloecystis vesiculosa
- Gloecystis botryoides
- Arcella rotundata Playfair 1917
- Arcella rotunda ssp. rotunda
- Cercobodo simplex Moroff ()
- Mastigella simplex Kent ()
- Monas sociabilis Meyer ()
- Clostenema socialis Stokes ()
- Monas socialis Kent ()
- Physomitus socialis Kent ()
- Oikomonas socialis Moroff ()
- Sphenomonas socialis Stokes ()
- Greeffia soli Singh & Hanumaiah 1979
- Phalansterium solitarium Sandon ()
- Trachipleistophora hominis
- Glugea truttae
- Microsporidium africanum
- Arcella polypora Penard 1890
- Apusomonas proboscidea Alexeieff ()
- Mastigella polyvacuolata Moroff ()
- Distigma proteus Ehrenberg ()
- Chrysocapsa planktonica Pascher ()
- Salpingoeca polygonatum Penard ()
- Euglypha polylepis Bonnet 1959
- Assulina seminulum ssp. seminulum
- Monas vivipara Ehrenberg ()
- Trachelomonas volvocina Ehrenberg ()