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)
- Order Gelidiales (39)
- Order Gigartinales (102)
- Family Areschougiaceae J. Agardh, 1876
- Family Calosiphoniaceae Kylin, 1932 (4)
- Family Caulacanthaceae Kützing, 1843 (3)
- Family Chondrymeniaceae Rodriguez-Prieto, G.Sartoni, S.-M.Lin & Hommersand, 2013 (1)
- Family Cruoriaceae (J. Agardh) Kylin, 1928 (3)
- Family Cystocloniaceae Kützing, 1843 (20)
- Family Dumontiaceae Bory, 1828 (9)
- Genus Dilsea Stackhouse, 1809 (2)
- Genus Dudresnaya P.L.Crouan & H.M.Crouan, 1835 (4)
- Genus Dumontia J.V.Lamouroux, 1813 (2)
- Genus Pikea Harvey, 1853 (1)
- Species Pikea californica Harvey, 1853
- Family Endocladiaceae Kylin
- Family Furcellariaceae Greville, 1830 (4)
- Family Gigartinaceae Bory, 1828 (4)
- Family Gloiosiphoniaceae F.Schmitz, 1892 (3)
- Family Haemeschariaceae Wilce & Maggs, 1989 (1)
- Family Kallymeniaceae (J. Agardh) Kylin, 1928 (14)
- Family Phyllophoraceae Willkomm, 1854 (19)
- Family Polyidaceae Kylin, 1956 (1)
- Family Ptilocladiopsidaceae Rodriguez-Prieto, Freshwater & Hommersand, 2014 (1)
- Family Rhizophyllidaceae Ardissone, 1869 (2)
- Family Rissoellaceae Kylin, 1932 (1)
- Family Schmiziellaceae Guiry, Garbary & G.W.Saunders (1)
- Family Solieriaceae J.Agardh, 1876 (9)
- Family Sphaerococcaceae Dumortier, 1822 (2)
- 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)