Between brackets is the number of accepted species
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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
- Order Chaetopeltidales
- Order Chaetophorales
- Order Chlamydomonadales
- Order Chlorococcales accepted as Chlamydomonadales
- Order Chlorophyceae (awaiting allocation)
- Order Chlorophyceae incertae sedis
- Order Chlorosarcinales accepted as Chlamydomonadales
- Order Microsporales accepted as Sphaeropleales
- Order Oedogoniales
- Order Receptaculitales †
- Order Receptaculitida † accepted as Receptaculitales †
- Order Sphaeropleales
- Family Ankistrodesmaceae Korshikov, 1953 accepted as Selenastraceae
- Family Bracteacoccaceae
- Family Bracteamorphaceae K. Fučíková, P.O. Lewis & L.A. Lewis, 2014
- Family Chaetopediaceae Skuja, 1948 accepted as Radiococcaceae Fott ex Komárek
- Family Characiaceae
- Family Chromochloridaceae K. Fuciková, P.O. Lewis & L.A. Lewis, 2014
- Family Coelastraceae accepted as Scenedesmaceae Oltmanns, 1904
- Family Cylindrocapsaceae N. Wille in Warming, 1884
- Family Dictyochloridaceae K. Fuciková, P.O. Lewis & L.A. Lewis, 2014
- Family Dictyococcaceae K. Fuciková, P.O. Lewis & L.A. Lewis, 2014
- Family Gloeocystaceae accepted as Radiococcaceae Fott ex Komárek
- Family Golenkiniaceae (Korshikov) Komárek, 1979 accepted as Neochloridaceae Ettl & Komárek, 1982
- Family Hydrodictyaceae
- Family Microsporaceae
- Family Mychonastaceae K. Fuciková, P.O. Lewis & L.A. Lewis, 2014
- Family Neochloridaceae Ettl & Komárek, 1982
- Family Nephrocytiaceae T.S. Garcia da Silva, I.L. Bagatini & L. Štenclová in Garcia da Silva et al., 2022
- Family Palmodictyaceae accepted as Radiococcaceae Fott ex Komárek
- Family Pseudomuriellaceae K. Fuciková, P.O. Lewis & L.A. Lewis, 2014
- Family Radiococcaceae Fott ex Komárek
- Family Radiofilaceae accepted as Sphaeropleaceae
- Family Rotundellaceae K. Fučíková, P.O. Lewis & L.A. Lewis, 2014
- Family Scenedesmaceae Oltmanns, 1904
- Genus Acutodesmus (Hegewald) Tsarenko, 2001 accepted as Tetradesmus G.M. Smith, 1913
- Genus Arthrodesmus C.G. Ehrenberg, 1836 accepted as Scenedesmus Meyen, 1829
- Genus Asterarcys A. Comas Gonzales, 1981
- Genus Asterosphaerium P.F. Reinsch, 1876
- Genus Astrocladium Tschourina, 1909
- Genus Bilgramia R.N. Yadava, 1990 accepted as Yadavaea J.N. Carpio-Lau, M.E. Mendoza-Tincopa & E.A. Molinari-Novoa, 2016
- Genus Chodatodesmus E. Hegewald, C. Bock & L. Krientitz, 2013
- Genus Closteriococcus W. Schmidle, 1905
- Genus Coelastrella Chodat, 1922
- Genus Coelastropsis B. Fott & T. Kalina, 1979
- Genus Coelastrum Nägeli, 1849
- Genus Cohniella Schröder, 1897
- Genus Comasiella E. Hegewald, M. Wolf, A. Keller, T. Friedl & L. Krienitz, 2010
- Genus Crucigeniopsis F. Hindák, 1984
- Genus Cryptodesmus P.M. Novis & G. Visnovsky, 2012 accepted as Coelastrella Chodat, 1922
- Genus Danubia F. Hindák, 1977
- Genus Desmodesmus (R. Chodat) S.S. An, T. Friedl & E. Hegewald, 1999
- Genus Dimorphococcus Braun, 1855
- Genus Enallax Pascher, 1943
- Genus Flechtneria K. Sciuto & L.A. Lewis in Sciuto et al., 2015
- Genus Gilbertsmithia M.O.P. Iyengar, 1975
- Genus Gloeoactinium G.M. Smith, 1926
- Genus Gloeopedia
- Genus Graesiella T. Kalina & M. Puncochárová, 1987
- Genus Hariotina P.-A. Dangeard, 1889
- Genus Hofmania Chodat, 1900 accepted as Komarekia Fott, 1981
- Genus Hylodesmus Eliás, Nemcová, Skaloud, Neustupa, Kaufnerová & Sejnohová, 2009
- Genus Komarekia Fott, 1981
- Genus Lageniastrum B. Renault, 1896 †
- Genus Lauterborniella Schmidle, 1900
- Genus Neodesmus F. Hindák, 1976
- Genus Pectinodesmus E. Hegewald, M. Wolf, A. Keller, T. Friedl & L. Krienitz, 2010
- Genus Pediludiella R. Hoshina, M. Hayakawa & T. Suzaki in Hoshina et al., 2020
- Genus Protodesmus M. Nakahara, H. Tsubota & S. Handa, 2017
- Genus Pseudodidymocystis Hegewald & Deason, 1989
- Genus Pseudotetradesmus Hirose & Akiyama, 1963
- Genus Pseudotetrastrum F. Hindák, 1977
- Genus Scenedesmus Meyen, 1829
- Genus Schistochilium J. Ralfs, 1845
- Genus Schmidledesmus P.C. Silva, 1970
- Genus Schmidleia J. Woloszynska, 1914
- Genus Schroederiella Woloszynska, 1914
- Genus Scotiellocystis B. Fott, 1976 accepted as Coelastrella Chodat, 1922
- Genus Scotiellopsis B. Fott, 1976 accepted as Coelastrella Chodat, 1922
- Genus Scotiellopsis Vinatzer, 1975 accepted as Coelastrella Chodat, 1922
- Genus Selenosphaerium Cohn, 1879
- Genus Soropediastrum Wille, 1924
- Genus Staurogenia Kützing, 1849
- Genus Staurogeniella W. Schmidle, 1901
- Genus Steinedesmus Kofoid, 1911
- Species Steinedesmus capitatus (G.M. Smith) Comas & Komárek, 1985 accepted as Scenedesmus raciborskii Woloszynska, 1914
- Genus Steiniella C. Bernard, 1908 accepted as Steinedesmus Kofoid, 1911
- Genus Suxenella P. Srivastava & J. Nizam, 1969 accepted as Asterarcys A. Comas Gonzales, 1981
- Genus Tetracoccus W. West, 1892 accepted as Westella De Wildeman, 1897
- Genus Tetradesmus G.M. Smith, 1913
- Genus Tetradictyon M.A. Romanov, 1964
- Genus Tetrallanthos accepted as Tetrallantos Teiling, 1916
- Genus Tetrallantos Teiling, 1916
- Genus Tetranephris C.R. Leite & C.E.M. Bicudo, 1977
- Genus Tetrastrum Chodat, 1895
- Genus Truncatulus I. Suto, 2006 †
- Genus Verrucodesmus E. Hegewald in Hegewald, Bock & Krientitz, 2013
- Genus Victoriella J. Woloszynska, 1914
- Genus Westella De Wildeman, 1897
- Genus Westellopsis C.-C. Jao, 1959
- Genus Willea Schmidle, 1900
- Genus Yadavaea J.N. Carpio-Lau, M.E. Mendoza-Tincopa & E.A. Molinari-Novoa, 2016
- Family Schizochlamydaceae K. Fuciková, P.O. Lewis & L.A. Lewis, 2014
- Family Schroederiaceae K. Fuciková, P.O. Lewis & L.A. Lewis, 2014
- Family Scotiellocystoidaceae (Fott, 1976) P.M. Tsarenko, 2005 accepted as Scenedesmaceae Oltmanns, 1904
- Family Selenastraceae
- Family Sphaeropleaceae
- Family Sphaeropleales incertae sedis
- Family Treubariaceae (Korshikov) Fott, 1960
- Family Tumidellaceae K. Fučíková, P.O. Lewis & L.A. Lewis, 2014
- Order Tetrasporales accepted as Chlamydomonadales
- Order Volvocales accepted as Chlamydomonadales
- Genus Gloeocystoides [author?] †
- Genus Kahfia A. Le Hérissé, H. Al-Tayyar & H. van der Eem, 1995 †
- Class Pedinophyceae
- Class Pleurastrophyceae accepted as Chlorophyceae
- Class Trebouxiophyceae
- Class Ulvophyceae
- 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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