Ra
, Radiathamnieae , Radiathamnion , Radicilingua , Ramicrusta , Ramirezia
- Ranavalona duckerae Kraft
Rhodophyta → Eurhodophytina → Florideophyceae → Rhodymeniophycidae → Gigartinales → Acrotylaceae
Re
, Reinboldia , Reinboldiella , Reingardia , Renouxia , Reptataxis , Reticulobotrys , Reticulocaulis
Rh
, Rhabdonia , Rhabdoniaceae , Rhipidothamnion , Rhizoglossum , Rhizolamiella , Rhizophyllidaceae , Rhizophyllum , Rhizopogonia , Rhodachlya , Rhodachlyaceae , Rhodachlyales , Rhodaphanes , Rhodella , Rhodellaceae , Rhodellales , Rhodellophyceae Cavalier-Smith , Rhodellophytina H.S.Yoon, K.M.Müller, R.G.Sheath, F.D.Ott & D.Bhattacharya , Rhodocallideae , Rhodocallis , Rhodochaetaceae , Rhodochaetales , Rhodochaete , Rhodochorton , Rhodochortonopsis , Rhodocladia , Rhodococcus , Rhododactylis , Rhododictyon , Rhododiplobia , Rhododiscus , Rhododraparnaldia , Rhododrewia , Rhodoglossum , Rhodogorgon , Rhodogorgonaceae , Rhodogorgonales , Rhodokrambe , Rhodolachne , Rhodolophia , Rhodomela
Rhodomelaceae Horaninow
- Abbottella Hollenberg 1
- Acanthophora J.V.Lamouroux 7
- Acrocystis Zanardini 1
- Adamsiella L.E.Phillips & W.A.Nelson 4
- Aiolocolax M.A.Pocock 1
- Alleynea Womersley 1
- Alsidium C.Agardh 7
- Amansia J.V.Lamouroux 15
- Amplisiphonia Hollenberg 1
- Aneurianna L.E.Phillips 4
- Antarctocolax Skottsberg 1
- Aphanocladia Falkenberg 6
- Ardissonula J.De Toni 1
- Benzaitenia <small>Yendo 1
- Beringiella M.J.Wynne 2
- Boergeseniella Kylin 2
- Bostrychia Montagne 39
- Bostrychiocolax Zuccarello & J.A.West 1
- Brongniartella Bory 1
- Bryocladia F.Schmitz 5
- Bryothamnion Kützing 3
- Chamaethamnion Falkenberg 2
- Chiracanthia Falkenberg 1
- Chondria C.Agardh 80
- Chondrophycus (J.Tokida & Y.Saito) Garbary & J.T.Harper 17
- Cladhymenia Harvey 6
- Cladurus Falkenberg 1
- Cliftonaea Harvey 1
- Coeloclonium J.Agardh 4
- Colacopsis De Toni 4
- Coronaphycus Metti 2
- Dasyclonium J.Agardh 10
- Dawsoniella Hollenberg 1
- Dawsoniocolax A.B.Joly & Yamaguishi-Tomita 1
- Dictyomenia Greville 6
- Digenea C.Agardh 4
- Diplocladia Kylin 1
- Dipterocolax J.Morrill 1
- Dipterosiphonia F.Schmitz & Falkenberg 7
- Ditria Hollenberg 3
- Doxodasya (F.Schmitz) Falkenberg 4
- Echinophycus Huisman 1
- Echinosporangium Kylin 1
- Echinothamnion Kylin 4
- Enantiocladia Falkenberg 4
- Endosiphonia Zanardini 4
- Epiglossum Kützing 2
- Epineuron Harvey 1
- Epizonaria Díaz-Tapia & Maggs 1
- Erythrocystis J.Agardh 2
- Erythrostachys J.Agardh ex Jean White 1
- Exophyllum Weber-van Bosse 1
- Gonatogenia J.Agardh 1
- Gredgaria Womersley 1
- Halitaenia J.Agardh 1
- Halopithys Kützing 3
- Haplodasya Falkenberg 2
- Hawaiia Hollenberg 1
- Herpopteros Falkenberg 1
- Herposiphonia Nägeli 59
- Herposiphoniella Womersley 1
- Heterocladia Decaisne 3
- Heterodasya Joly & Oliveira 1
- Heterostroma Kraft & M.J.Wynne 1
- Holotrichia F.Schmitz 1
- Husseya J.Agardh 1
- Janczewskia Solms-Laubach 11
- Jantinella Kylin 2
- Jeannerettia J.D.Hooker & Harvey 1
- Kentrophora S.M.Wilson & Kraft 2
- Kintarosiphonia S.Uwai & M.Masuda 1
- Kuetzingia Sonder 3
- Lampisiphonia H.-G.Choi, Díaz Tapia & Bárbara 1
- Laurencia J.V.Lamouroux 151
- Laurenciella V.Cassano, Gil-Rodríguez, Sentíes, Díaz-Larrea, M.C.Oliveira & M.T.Fujii 2
- Laurenciocolax A.D.Zinova & Perestenko 1
- Leachiella Kugrens 1
- Lembergia Saenger 1
- Lenormandia Sonder 6
- Leptosiphonia Kylin 1
- Leveillea Decaisne 3
- Levringiella Kylin 2
- Lophocladia (J.Agardh) F.Schmitz 7
- Lophosiphonia Falkenberg 10
- Lophothalia Kützing
- Lophura Kützing 1
- Lophurella F.Schmitz 7
- Melanothamnus Bornet & Falkenberg 49
- Meridiocolax J.Morrill 3
- Metamorphe Falkenberg 1
- Microcolax F.Schmitz 2
- Micropeuce J.Agardh 5
- Murrayella F.Schmitz 2
- Nanopera S.M.Wilson & G.T.Kraft 1
- Neochondria S.Sutti, M.Tani, Y.Yamagishi, T.Abe & K.Kogame 2
- Neorhodomela Masuda 6
- Neotenophycus Kraft & I.A.Abbott 1
- Neurymenia J.Agardh 2
- Odonthalia Lyngbye 13
- Ohelopapa F.Rousseau, Martin-Lescanne, Payri & L.Le Gall 1
- Oligocladella P.C.Silva 3
- Onychocolax M.A.Pocock 1
- Ophidocladus Falkenberg 1
- Osmundaria J.V.Lamouroux 8
- Osmundea Stackhouse 24
- Pachychaeta Kützing 2
- Palisada K.W.Nam 25
- Periphykon Weber-van Bosse 2
- Perrinia Womersley 1
- Phaeocolax Hollenberg 1
- Picconiella De Toni fil. 2
- Pityophykos Papenfuss 1
- Placophora J.Agardh 3
- Pleurostichidium Heydrich 1
- Pollexfenia Harvey 5
- Polyostea Ruprecht 4
- Polysiphonia Greville 209
- Polyzonia Suhr 1
- Protokuetzingia Falkenberg 1
- Pterochondria Hollenberg 1
- Pterosiphonia Falkenberg 11
- Pterosiphoniella E.Y.Dawson 1
- Pycnothamnion P.J.L.Dangeard 1
- Rhodolachne M.J.Wynne 1
- Rhodomela C.Agardh 12
- Rhodomelopsis Pocock 1
- Rodriguezella F.Schmitz 7
- Rytiphlaea C.Agardh 5
- Savoiea M.J.Wynne 4
- Schizochlaenion M.J.Wynne & R.E.Norris 1
- Sonderella F.Schmitz 1
- Spirocladia Børgesen 4
- Spirophycus A.J.K.Millar 1
- Sporoglossum Kylin 1
- Stichothamnion Børgesen 2
- Stictosiphonia J.D.Hooker & Harvey 2
- Streblocladia F.Schmitz 7
- Stromatocarpus Falkenberg 1
- Symphyocladia Falkenberg 16
- Symphyocolax M.S.Kim 1
- Tayloriella Kylin 4
- Thaumatella (Falkenberg) Kylin 2
- Tiparraria Womersley 1
- Tolypiocladia F.Schmitz 4
- Trichidium J.M.Noble & Kraft 1
- Tylocolax F.Schmitz 1
- Ululania K.E.Apt & K.E.Schlech 1
- Veleroa E.Y.Dawson 7
- Vertebrata S.F.Gray 20
- Vidalia J.V.Lamouroux ex J.Agardh 2
- Waldoia W.R.Taylor 1
- Wilsonaea F.Schmitz 1
- Wilsonosiphonia D.Bustamante, Won & T.O.Cho 3
- Womersleyella Hollenberg 3
- Wrightiella F.Schmitz 2
- Xiphosiphonia Savoie & G.W.Saunders 3
- Yuzurua (Nam) Martin-Lescanne 2
Plantae → Rhodophyta → Florideophyceae → Ceramiales
, Rhodomelopsis , Rhodonema , Rhodonematella , Rhodopeltis , Rhodopeltis , Rhodophyllis , Rhodophysema , Rhodophysemataceae , Rhodophysemopsis
Koljeno Rhodophyta Wettstein
- Potkoljeno Cyanidiophytina H.S.Yoon, K.M.Müller, R.G.Sheath, F.D.Ott & D.Bhattacharya
- Potkoljeno Eurhodophytina G.W.Saunders & Hommersand
- Potkoljeno Proteorhodophytina Muñoz-Gómez, Mejía-Franco, Durnin, Colp, Grisdale, J.M.Archibald & Slamovits
- Razredi: Bangiophyceae, Compsopogonophyceae, Cyanidiophyceae, Florideophyceae, Porphyridiophyceae, Rhodellophyceae, Rhodophyta incertae sedis, Stylonematophyceae
Eukaryota → Plantae → Biliphyta
, Rhodophyta incertae sedis , Rhodoplexia , Rhodoptilum , Rhodoseris , Rhodosiphonia , Rhodosorus , Rhodospora , Rhodothamniella , Rhodothamniellaceae , Rhodymenia , Rhodymeniaceae , Rhodymeniales , Rhodymeniales incertae sedis , Rhodymeniocolax , Rhodymeniophycidae , Rhodytapium
Ri
, Ricardia , Riquetophycus , Rissoella , Rissoellaceae
Ro
, Robea , Rodriguezella , Roschera
Ru
, Rubrointrusa , Rufusia , Rufusiaceae , Rufusiales , Ruprechtiella
Ry
, Rytiphlaea