Between brackets is the number of accepted marine extant species
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Shows the number of accepted marine extant species within the taxon
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- Biota (1 799)
- Kingdom Chromista (437)
- Kingdom Plantae (1 362)
- Subkingdom Biliphyta (1 064)
- Phylum (Division) Rhodophyta (1 064)
- Subphylum (Subdivision) Eurhodophytina (1 035)
- Class Bangiophyceae (20)
- Class Florideophyceae (1 015)
- Subclass Ahnfeltiophycidae (1)
- Subclass Corallinophycidae (119)
- Subclass Hildenbrandiophycidae (3)
- Subclass Nemaliophycidae (120)
- Subclass Rhodymeniophycidae (772)
- Order Acrosymphytales (4)
- Order Atractophorales (1)
- Order Bonnemaisoniales (9)
- Order Ceramiales (414)
- Suborder Ceramiineae
- Suborder Spermothamniineae
- Family Callithamniaceae Kützing, 1843 (38)
- Family Ceramiaceae Dumortier, 1822 (91)
- Family Dasyaceae Kützing, 1843
- Family Delesseriaceae Bory, 1828 (68)
- Family Rhodomelaceae Horaninow, 1847 (179)
- Tribe Alsidieae Ardissone, 1883 (3)
- Tribe Amansieae Schmitz & Hauptfleisch, 1889 (3)
- Tribe Bostrychieae Falkenberg, 1901 (1)
- Tribe Chondrieae F.Schmitz & Falkenberg, 1897 (15)
- Tribe Dipterosiphonieae Díaz-Tapia & Maggs, 2017 (3)
- Tribe Herposiphonieae Schmitz & Falkenberg, 1897 (4)
- Tribe Laurencieae F.Schmitz, 1889 (41)
- Genus Chondrophycus (J.Tokida & Y.Saito) Garbary & J.T.Harper, 1998 (2)
- Genus Janczewskia Solms-Laubach, 1877 (1)
- Genus Laurencia J.V.Lamouroux, 1813 (16)
- Genus Ohelopapa F.Rousseau, Martin-Lescanne, Payri & L.Le Gall, 2017 (1)
- Genus Osmundea Stackhouse, 1809 (10)
- Genus Palisada K.W.Nam, 2007 (6)
- Genus Rodriguezella F.Schmitz, 1895 (4)
- Genus Yuzurua (Nam) Martin-Lescanne, 2010 (1)
- Species Yuzurua poiteaui (J.V.Lamouroux) Martin-Lescanne, 2010
- Tribe Lophosiphonieae Fritsch, 1945 (2)
- Tribe Lophothalieae Schmitz & Falkenberg, 1897 (1)
- Tribe Ophidocladeae Díaz-Tapia & Maggs, 2017 (1)
- Tribe Polysiphonieae Schmitz, 1889 (63)
- Tribe Pterosiphonieae Falkenberg, 1901 (10)
- Tribe Rhodomeleae (5)
- Tribe Streblocladieae Díaz-Tapia & Maggs, 2017 (26)
- Genus Deltalsia Díaz-Tapia & Rodríguez-Buján, 2022 (1)
- Genus Ricardia Derbès & Solier, 1856 accepted as Erythrocystis J.Agardh, 1876
- Genus Rytiphloea accepted as Rytiphlaea C.Agardh, 1817
- Family Sarcomeniaceae Womersley, 2003
- Family Spyridiaceae
- Family Wrangeliaceae J.Agardh, 1851 (38)
- Order Gelidiales (39)
- Order Gigartinales (102)
- Order Gracilariales (17)
- Order Halymeniales (32)
- Order Nemastomatales (16)
- Order Peyssonneliales (64)
- Order Plocamiales (5)
- Order Rhodymeniales (65)
- Order Sebdeniales (4)
- Subphylum (Subdivision) Proteorhodophytina (24)
- Class Rhodophyta incertae sedis (5)
- Subkingdom Viridiplantae (298)