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)
- Order Acrochaetiales (55)
- Order Batrachospermales
- Order Colaconematales (22)
- Order Nemaliales (32)
- Suborder Galaxaurineae (9)
- Suborder Nemaliineae (1)
- Family Liagoraceae Kützing, 1843 (22)
- Genus Cylindraxis Kraft, 1989 (1)
- Genus Dermonema Harvey ex Heydrich, 1894 (2)
- Genus Ganonema K.-C.Fan & Yung-C.Wang, 1974 (2)
- Genus Helminthocladia J.Agardh, 1851 (4)
- Genus Helminthora J.Agardh, 1851 (1)
- Species Helminthora divaricata (C.Agardh) J.Agardh, 1852
- Genus Liagora J.V.Lamouroux, 1812 (9)
- Genus Neoizziella S.M.Lin, S.-Y.Yang & Huisman, 2011 (1)
- Genus Titanophycus Huisman, G.W.Saunders & A.R.Sherwood, 2006 (1)
- Genus Trichogloeopsis I.A.Abbott & Doty, 1960 (1)
- Order Palmariales (11)
- Subclass Rhodymeniophycidae (772)
- Subphylum (Subdivision) Proteorhodophytina (24)
- Class Rhodophyta incertae sedis (5)
- Subkingdom Viridiplantae (298)