Pha
- Phaeodaria
Phascolodon Stein, 1859
- Phascolodon contractilis Kahl, 1926
- Phascolodon elongatus
- Phascolodon limneticum Gelei, 1954
- Phascolodon vorticella Stein, 1859
Chromista → Ciliophora → Cyrtophoria → Cyrtophorida → Chilodonellidae
Pho
- Phormacantha
- Phormospyris
- Phormostichoartus
- Phorticium
Phr
- Phragmosporangium
- Phrenocodon
Phy
- Phytophthora
- Phytopythium