Pro
- Protascus
- Protoachlya
- Protobremia
- Protocystis
Red Protoheterotrichida Nouzarède, 1977
- Geleiidae Kahl, 1933
Chromista → Ciliophora → Karyorelictea
- Protoscenium
Red Protostomatida Small & Lynn, 1985
- Kentrophoridae Jankowksi, 1980
- Trachelocercidae Kent, 1881
Chromista → Ciliophora → Karyorelictea
Prototrachelocerca Foissner, 1996
- Prototrachelocerca fasciolata Sauerbrey, 1928
Chromista → Ciliophora → Karyorelictea → Protostomatida → Trachelocercidae
Pry
Porodica Prymnesiaceae Conrad, 1926
- Rodovi: Chrysoculter, Corymbellus, Haptolina, Imantonia, Prymnesium, Pseudohaptolina
Chromista → Hacrobia → Haptophyta → Prymnesiophyceae → Prymnesiales
Red Prymnesiales Papenfuss, 1955
- Porodica Chrysochromulinaceae
- Porodica Chrysotilaceae
- Porodica Prymnesiaceae Conrad, 1926
Chromista → Hacrobia → Haptophyta → Prymnesiophyceae
Razred Prymnesiophyceae Hibberd
- Red Coccolithales
- Red Coccosphaerales
- Red Isochrysidales
- Red Phaeocystales
- Red Prymnesiales
- Red Prymnesiophyceae incertae sedis
- Red Syracosphaerales
- Red Zygodiscales
Chromista → Hacrobia → Haptophyta
Red Prymnesiophyceae incertae sedis
- Rodovi: Actinozygus, Alvearium, Amithalithina, Amphizygus, Athenagalea, Biscutum, Corollithion, Cricolithus, Cyclicargolithus, Cycloperfolithus, Dictyococcites, Diloma, Discoasteroides, Discolithus, Ericsonia, Ethmorhabdus, Eurhabdus, Florisphaera, Heliolithus, Lapideacassis, Lucianorhabdoites, Metadoga, Misceomarginatus, Multipartis, Munarinus, Najadea, Neocrepidolithus, Neosphaera, Octopodorhabdus, Okkolithus, Orastrum, Ottavianus, Palaeopontosphaera, Pharus, Ramsaya, Retecapsa, Rhabdolekiskus, Rhabdolithes, Rhipidodendron, Russellia, Seribuscutum, Spongomonas, Staurolithites, Teichorhabdus, Tetralithus, Thiersteinia, Trapezopentus, Vagalapilla, Vekshinella, Watznaueria, Zygodiscus
Chromista → Hacrobia → Haptophyta → Prymnesiophyceae
Prymnesium Massart, 1920
- Prymnesium annuliferum C.Billard, 1983
- Prymnesium calathiferum Chang & Ryan, 1985
- Prymnesium chiton (Parke & Manton) Edvardsen, Eikrem & Probert, 2011
- Prymnesium czosnowskii Starmach, 1968
- Prymnesium faveolatum Fresnel, 2001
- Prymnesium kappa (Parke & Manton) Edvardsen, Eikrem & Probert, 2011
- Prymnesium minus (Parke & Manton) Edvardsen, Eikrem & Probert, 2011
- Prymnesium minutum N.Carter, 1937
- Prymnesium nemamethecum R.N.Pienaar & M.Birkhead, 1994
- Prymnesium neolepis (M.Yoshida, M.-H.Noel, T.Nakayama, T, Naganuma & I. Inouye) Edvardsen, Eikrem & Probert, 2011
- Prymnesium neustophilum (R.E. Norris) Edvardsen, Eikrem & Probert, 2011
- Prymnesium palpebrale (Seoane, Eikrem, Edvardsen & Pienaar) Edvardsen, Eikrem & Probert, 2011
- Prymnesium parvum N.Carter, 1937
- Prymnesium pienaarii (Gayral & Fresnel) Edvardsen, Eikrem & Probert, 2011
- Prymnesium pigrum (Geitler) Edvardsen, Eikrem & Probert, 2011
- Prymnesium polylepis (Manton & Parke) Edvardsen, Eikrem & Probert, 2011
- Prymnesium radiatum Sym, Pienaar, Edvardsen & Egge, 2011
- Prymnesium saltans J.Massart ex Conrad, 1926
- Prymnesium simplex (Gayral & Fresnel) Edvardsen, Eikrem & Probert, 2011
- Prymnesium zebrinum C.Billard, 1983
Chromista → Hacrobia → Haptophyta → Prymnesiophyceae → Prymnesiales → Prymnesiaceae