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)
- Order Corallinales (76)
- Order Hapalidiales (41)
- Order Sporolithales (2)
- Family Sporolithaceae E. Verheij, 1993 (2)
- Genus Sporolithon Heydrich, 1897 (2)
- Species Sporolithon africanum (Foslie) J.Afonso-Carillo, 1986
- Species Sporolithon ptychoides Heydrich, 1897
- Subclass Hildenbrandiophycidae (3)
- Subclass Nemaliophycidae (120)
- Subclass Rhodymeniophycidae (772)
- Subphylum (Subdivision) Proteorhodophytina (24)
- Class Rhodophyta incertae sedis (5)
- Subkingdom Viridiplantae (298)