Dodatak:Popis Zlatne alge, P
- Parachrysostomum Zanon
- Paraphysomonadaceae
- Paraphysomonas De Saedeleer, 1930
- Parmales
- Pascherella W.Conrad, 1926
- Pedinomonadopsis Massyuk & Guk, 1983
- Pedospumella Boenigk & Findenig, 2010
- Peltomonas Vlk, 1941
- Pentalamina H.J.Marchant, 1987
- Pentalaminaceae Marchant, 1987
- Phacomonas Lohmann, 1903
- Phaeaster Scherffel, 1927
- Phaeobotrys H.Ettl, 1966
- Phaeococcus Borzì, 1892
- Phaeodermatium Hansgirg, 1889
- Phaeoplaca Chodat, 1926
- Phaeosphaera West & G.S.West, 1903
- Phanulithus F.H.Wind & S.W.Wise, 1977
- Platychrysella Valkanov, 1970
- Platytheca F.Stein, 1878
- Polykyrtos Pascher, 1939
- Polylepidomonas Preisig & D.J.Hibberd, 1983
- Porochrysis Pascher, 1917
- Porostylon Pascher, 1940
- Poterioochromonas Scherffel, 1901
- Poteriospumella Boenigk & Findenig, 2010
- Pseudokephyrion Pascher, 1913
- Pseudosyncrypta Kisselev, 1931
- Pyramidochrysis Pascher, 1909