Between brackets is the number of accepted species
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2 Shows the number of accepted species within the taxon
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- Biota
- Kingdom Animalia
- Kingdom Archaea
- Kingdom Bacteria
- Kingdom Chromista
- Kingdom Fungi
- Kingdom Plantae
- Phylum Acritarcha †
- Phylum Algae (awaiting allocation)
- Phylum Algae incertae sedis
- Phylum Anthocerotophyta
- Phylum Bryophyta
- Phylum Calcitarcha †
- Phylum Charophyta
- Phylum Chlorophyta
- Subdivision Chlorophytina
- Class Bryopsidophyceae accepted as Ulvophyceae
- Class Chlorodendrophyceae
- Class Chlorophyceae
- Class Pedinophyceae
- Class Pleurastrophyceae accepted as Chlorophyceae
- Class Trebouxiophyceae
- Class Ulvophyceae
- Order Acrosiphoniales accepted as Ulotrichales
- Order Bryopsidales
- Order Chlorocystidales accepted as Ulotrichales
- Order Cladophorales
- Family Anadyomenaceae Kützing, 1843
- Family Arnoldiellaceae accepted as Cladophoraceae Wille, 1884
- Family Boodleaceae Børgesen, 1925
- Family Cladophoraceae Wille, 1884
- Genus Acrocladus Nägeli, 1847 accepted as Lychaete J.G. Agardh, 1846
- Genus Aegagropila Kützing, 1843
- Genus Annulina Link in C.G.D. Nees, 1820
- Genus Aplonema Hassall, 1845
- Genus Arnoldiella V.V. Miller, 1928
- Genus Basicladia W.E. Hoffmann & J.E. Tilden, 1930
- Genus Bryobesia Weber-van Bosse, 1911
- Genus Caerea
- Genus Chaetocladiella C. Meyer & A. Skabistschevsky, 1968
- Species Chaetocladiella microscopica (C. Meyer) C. Meyer & A.P. Skabichevskij, 1968
- Species Chaetocladiella pumila (C. Meyer) C. Meyer & A.P. Skabichevskij
- Genus Chaetomorpha Kützing, 1845
- Genus Chaetomorphopsis H.L. Lyon in J.E. Tilden, 1901
- Genus Chaetonella Schmidle, 1901
- Genus Chambalia S. Kumar, 2001 †
- Genus Chloronitum Gaillon in F. Cuvier, 1828
- Genus Chloropteris Montagne, 1850
- Genus Cladochaete C. Meyer & A. Skabistschevsky, 1965 accepted as Chaetocladiella C. Meyer & A. Skabistschevsky, 1968
- Genus Cladogonium H. Hirose & M. Akiyama, 1971
- Genus Cladophora Kützing, 1843
- Genus Cladophorella F.E. Fritsch, 1944
- Genus Cladostroma Skuja in Handel-Mazzetti, 1937
- Genus Conferva Linnaeus, 1753
- Genus Cystothrix J.E. Gray, 1864
- Genus Cytophora J.E. Gray, 1864
- Genus Gemmiphora A. Skabichevskii, 1931
- Genus Hormiscia Fries, 1835
- Genus Hormotrichum Kützing, 1845
- Genus Leptocystea J.E. Gray, 1864
- Genus Lurbica C. Boedeker in Boedeker et al., 2016
- Genus Lychaete J.G. Agardh, 1846
- Genus Magnusina O. Kuntze, 1891
- Genus Microspora Hassall, 1843
- Genus Pithophora Wittrock, 1877
- Genus Prolifera Vaucher, 1803 accepted as Cladophora Kützing, 1843
- Genus Pseudorhizoclonium C. Boedeker in Boedeker et al., 2016
- Genus Rama V.J. Chapman, 1952 accepted as Rhizoclonium Kützing, 1843
- Genus Rhizoclonium Kützing, 1843
- Genus Rothella Gaillon, 1833
- Genus Spongiochrysis F. Rindi, J.M. López-Bautista, A.R. Sherwood & M.D. Guiry, 2006
- Genus Spongopsis Kützing, 1843
- Genus Spongosiphonia J.E. Areschoug, 1866
- Genus Vagabundia J.E. Gray, 1864
- Genus Wittleria Grateloup (?) accepted as Cladophora Kützing, 1843
- Genus Wittrockiella Wille, 1909
- Family Cladophorales (awaiting allocation)
- Family Dictyosphaeriaceae Kützing, 1849 accepted as Siphonocladaceae Schmitz, 1879
- Family Okellyaceae F. Leliaert & J. Rueness in Leliaert, Rueness, Boedeker, Maggs, Cocquyt, Verbruggen & De Clerck, 2009
- Family Pithophoraceae
- Family Pseudocladophoraceae
- Family Siphonocladaceae Schmitz, 1879
- Family Valoniaceae Kützing, 1849
- Family Wittrockiellaceae accepted as Pithophoraceae
- Genus Proterocladus N.J. Butterfield in Butterfield et al., 1994 †
- Order Ctenocladales accepted as Ulvales
- Order Cyclocrinales †
- Order Dasycladales
- Order Ignatiales
- Order Oltmannsiellopsidales
- Order Phaeophilales accepted as Ulvales
- Order Scotinosphaerales
- Order Siphonales accepted as Bryopsidales
- Order Siphonocladales accepted as Cladophorales
- Order Trentepohliales
- Order Ulotrichales
- Order Ulvales
- Order Ulvophyceae (awaiting allocation)
- Genus Symbiochlorum S. Gong & Z. Li in Gong et al., 2018
- Subdivision Prasinophytina
- Class Chlorophyta (awaiting allocation)
- Class Chloropicophyceae
- Class Picocystophyceae
- Class Prasinophyceae accepted as Prasinophytina
- Genus Archaeochaeta K.M. Maloney, D.P. Maverick, J.D. Schiffbauer, G.P. Halverson, S. Xiao & M. Laflamme, 2023 †
- Genus Archaeophycus F. Wang, X. Zhang & R. Guo, 1983 †
- Genus Characrhynium Krings, 2024 †
- Genus Chordecystia C.B. Foster, 1979 † accepted as Reduviasporonites L.R. Wilson, 1962 †
- Genus Dictyosphaera Y. Xing & K. Liu, 1973 †
- Genus Harpericystis Krings, 2024 †
- Genus Jiuqunaoella M. Chen & Z.Z. Xiao, 1991 †
- Genus Menieria Y. Wang, J. Jin & R. Zhan, 2014 †
- Genus Palambages O. Wetzel, 1961 †
- Genus Paratetraphycus Z. Zhang, 1985 † accepted as Archaeophycus F. Wang, X. Zhang & R. Guo, 1983 †
- Genus Reduviasporonites L.R. Wilson, 1962 †
- Genus Sarcinophycus S. Xiao & A.H. Knoll, 1999 †
- Genus Shuiyousphaeridium Yan in Yan & Zhu, 1992 †
- Genus Sphaerosiphon Schussnig, 1915
- Genus Tympanicysta B.E. Balme, 1980 † accepted as Reduviasporonites L.R. Wilson, 1962 †
- Genus Yunnanospirellus Li, Wei, Guo & Cong, 2024 †
- Phylum Eophyta †
- Phylum Glaucophyta
- Phylum Gymnospermophyta accepted as Tracheophyta
- Phylum Horneophyta †
- Phylum Magnoliophyta accepted as Tracheophyta
- Phylum Marchantiophyta
- Phylum Picozoa
- Phylum Plantae (awaiting allocation)
- Phylum Prasinodermatophyta
- Phylum Pteridophyta accepted as Tracheophyta
- Phylum Rhodelphidia
- Phylum Rhodophyta
- Phylum Sporae dispersae †
- Phylum Tracheophyta
- Phylum Vendophyta † accepted as Algae incertae sedis
- Class Nematophyceae † accepted as Nematophyta †
- Kingdom Protista accepted as Protozoa
- Kingdom Protozoa
- Kingdom Viruses
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