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 (247 566)
- Kingdom Animalia (211 530)
- Kingdom Archaea (117)
- Kingdom Bacteria (2 223)
- Kingdom Chromista (20 791)
- Kingdom Fungi (1 432)
- Kingdom Monera represented as Bacteria
- Kingdom Plantae (10 581)
- Subkingdom Biliphyta (7 647)
- Phylum (Division) Rhodophyta (7 647)
- Subphylum (Subdivision) Eurhodophytina (7 523)
- Class Bangiophyceae (231)
- Class Florideophyceae (7 292)
- Subclass Ahnfeltiophycidae (12)
- Subclass Corallinophycidae (848)
- Order Corallinales (563)
- Suborder Corallinineae (487)
- Family Corallinaceae Lamouroux, 1812 (193)
- Family Lithophyllaceae Athanasiadis, 2016 (237)
- Family Lithothamniaceae H.J.Haas, 1886
- Family Spongitaceae Kützing, 1843
- Family Spongitidaceae Kützing, 1843 (57)
- Subfamily Neogoniolithoideae A.Kato & M.Baba, 2011 (56)
- Genus Neogoniolithon Setchell & L.R.Mason, 1943 (45)
- Genus Spongites Kützing, 1841 (11)
- Species Spongites absimilis (Foslie & M.Howe) Afonso-Carrillo, 1988
- Species Spongites africana (Foslie) J.Afonso-Carrillo, M.Chacana & M.Sanson, 1993
- Species Spongites agariciformis (Pallas) Kützing, 1849 accepted as Mesophyllum lichenoides (J.Ellis) Me.Lemoine, 1928
- Species Spongites byssoides (Lamarck) Kützing, 1869 accepted as Lithophyllum byssoides (Lamarck) Foslie, 1900
- Species Spongites calcareus (Pallas) Kützing, 1849 accepted as Phymatolithon calcareum (Pallas) W.H.Adey & D.L.McKibbin ex Woelkering & L.M.Irvine, 1986
- Species Spongites colliculosus (Masaki) Maneveldt & Keats, 2016
- Species Spongites confluens Kützing, 1841 accepted as Lithophyllum incrustans Philippi, 1837
- Species Spongites corallioides P.Crouan & H.Crouan, 1852 accepted as Lithothamnion corallioides (P.Crouan & H.Crouan) P.Crouan & H.Crouan, 1867
- Species Spongites crassus (Philippi) Kützing, 1869 accepted as Lithophyllum duckerae Woelkerling, 1983
- Species Spongites crustacea Kützing, 1843
- Species Spongites decipiens (Foslie) Y.M. Chamberlain, 1993 accepted as Chamberlainium decipiens (Foslie) Caragnano, Foetisch, Maneveldt & Payri, 2018
- Species Spongites decussatus Kützing, 1849 accepted as Lithophyllum decussatum (J.Ellis & Solander) Philippi, 1837
- Species Spongites dentatus Kützing, 1841 accepted as Lithophyllum dentatum (Kützing) Foslie, 1898
- Species Spongites discoideus (Foslie) Penrose & Woelkerling, 1988
- Species Spongites fasciculata (Lamarck) Kützing, 1849 accepted as Lithophyllum fasciculatum (Lamarck) Foslie, 1898
- Species Spongites fruticulosus Kützing, 1841
- Species Spongites hauckii (Rothpletz) Ballesteros, 1993 accepted as Neogoniolithon mamillosum (Hauck) Setchell & L.R.Mason, 1943
- Species Spongites hyperellus (Foslie) D.L.Penrose, 1996
- Species Spongites impar (Foslie) Y.M.Chamberlain, 1994
- Species Spongites mamillosa (Hauck) Ballesteros, 1990 accepted as Neogoniolithon mamillosum (Hauck) Setchell & L.R.Mason, 1943
- Species Spongites nodosus Kützing, 1841 accepted as Lithothamnion nodosum (Kützing) Woelkerling, 1985
- Species Spongites notarisii (Dufour) Athanasiadis, 1987 accepted as Neogoniolithon brassica-florida (Harvey) Setchell & L.R.Mason, 1943
- Species Spongites onkodes (Heydrich) Penrose & Woelkerling, 1988 accepted as Porolithon onkodes (Heydrich) Foslie, 1909
- Species Spongites orbiculatus (T.Masaki) Maneveldt & D.W.Keats, 2016 accepted as Dawsoniolithon orbiculatum (T.Masaki) R.A.Townsend & Huisman, 2018
- Species Spongites polymorpha Kützing, 1849 accepted as Phymatolithon calcareum (Pallas) W.H.Adey & D.L.McKibbin ex Woelkering & L.M.Irvine, 1986
- Species Spongites racemosus Kützing, 1841 accepted as Neogoniolithon racemosum (Kützing) Basso & Rodondi, 2006
- Species Spongites ramulosus (Philippi) Kützing, 1869 accepted as Spongites fruticulosus Kützing, 1841
- Species Spongites reinboldii (Weber-van Bosse & Foslie) Penrose & Woelkering, 1988 accepted as Hydrolithon reinboldii (Weber Bosse & Foslie) Foslie, 1909
- Species Spongites sporolithon Kalugina-Gutnik, Perestenko & Titlyanova, 1992
- Species Spongites stalactiticus Kützing, 1841 accepted as Spongites fruticulosus Kützing, 1841
- Species Spongites sulawesiensis Verheij, 1994
- Species Spongites tunicatus Penrose, 1996
- Species Spongites verruculosus Zeller, 1876
- Species Spongites wildpretii Afonso-Carrillo, 1988 accepted as Harveylithon samoënse (Foslie) A.Rösler, Perfectti, V.Peña & J.C.Braga, 2016
- Species Spongites yendoi (Foslie) Y.M.Chamberlain, 1993
- Genus Rhizolamiella Shevejko, 1982 (1)
- Suborder Mesophyllineae
- Family Corallinales incertae sedis (1)
- Family Hydrolithaceae R.A.Townsend & Huisman, 2018 (29)
- Family Mastophoraceae R.A.Townsend & Huisman, 2018 (14)
- Family Porolithaceae R.A.Townsend & Huisman, 2018 (32)
- Order Corallinapetrales (2)
- Order Hapalidiales (245)
- Order Rhodogorgonales (3)
- Order Sporolithales (35)
- Subclass Hildenbrandiophycidae (14)
- Subclass Nemaliophycidae (618)
- Subclass Rhodymeniophycidae (5 790)
- Order Florideophyceae incertae sedis (8)
- Order Rhodachlyales (2)
- Subphylum (Subdivision) Proteorhodophytina (103)
- Subphylum (Subdivision) Rhodellophytina
- Class Rhodophyceae accepted as Rhodophyta
- Class Rhodophyta incertae sedis (21)
- Subkingdom Viridiplantae (2 907)
- Phylum (Division) Chlorarachniophyta accepted as Chlorarachnea (15)
- Phylum (Division) Chloroplastida
- Phylum (Division) Craspediophyta accepted as Choanozoa
- Phylum (Division) Craspedophyta accepted as Choanozoa
- Phylum (Division) Euglenophyta accepted as Discomitochondria
- Phylum (Division) Glaucophyta
- Phylum (Division) Picozoa (1)
- Phylum (Division) Plantae incertae sedis (11)
- Phylum (Division) Prasinophyta accepted as Prasinophyceae
- Phylum (Division) Prymnesiophyta accepted as Prymnesiophyceae
- Phylum (Division) Rhodelphidia
- Kingdom Protozoa (766)
- Kingdom Viruses (115)