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
- Order Chlorellales
- Family Chlorellaceae Brunnthaler, 1913
- Genus Acanthosphaera Lemmermann, 1899
- Genus Actinastrum Lagerheim, 1882
- Genus Apatococcus F. Brand, 1925
- Genus Apodococcus F. Hindák, 1984
- Genus Archerina Lankester, 1885
- Genus Autumnella S. Ulrich & K. Röske, 2018
- Genus Auxenochlorella (I. Shihira & R.W. Krauss) T. Kalina & M. Puncochárová, 1987
- Genus Brachionococcus Naumann, 1919
- Genus Brandtia R. Hoshina in Hoshina et al., 2017 accepted as Carolibrandtia R. Hoshina & T. Nakada, 2018
- Genus Carolibrandtia R. Hoshina & T. Nakada, 2018
- Genus Catena Chodat, 1900
- Genus Chlorella M. Beijerinck, 1890
- Genus Chloroparva B. Somogyi, T. Felfoldi & L. Voros in Somogyi et al., 2011
- Genus Closteriopsis Lemmermann, 1899
- Genus Coccothrix P.A. Broady & G.M. Lokhorst, 2000
- Genus Compactochlorella L. Krienitz, C. Bock, K. Kotut & T. Pröschold, 2012
- Genus Coronacoccus H. Song, X. Liu, Y. Hu, Q. Wang, J. Long, G. Liu & Z. Hu, 2018
- Genus Coronastrum R.H. Thompson, 1938
- Genus Cylindrocelis F. Hindák, 1988
- Genus Dactylosphaerium Steinecke, 1916
- Genus Diacanthos Korshikov, 1953 accepted as Micractinium Fresenius, 1858
- Genus Dicellula Svirenko, 1926
- Genus Dicloster C.-C. Jao, Y.S. Wei & H.C. Hu, 1976
- Genus Dictyosphaerium Nägeli, 1849
- Genus Didymogenes Schmidle, 1905
- Species Didymogenes anomala (G.M. Smith) Hindák, 1974
- Species Didymogenes dubia Fott
- Species Didymogenes granulata (Hortobágyi) Hindák
- Species Didymogenes hortobagyii (Hortobagyi) Ergashev
- Species Didymogenes palatina Schmidle, 1905
- Genus Dimorphococcopsis C.-C. Jao, 1959
- Genus Endolithella T.P. Martins, V. Ramos, G.S. Hentschke & L. Krienitz in Martins et al., 2019
- Genus Errerella Conrad, 1913 accepted as Micractinium Fresenius, 1858
- Genus Geminella Turpin, 1828
- Genus Gloeotila Kützing, 1843
- Genus Golenkeniopsis O. Korshikov, 1953 accepted as Golenkiniopsis Korshikov, 1953
- Genus Golenkiniopsis Korshikov, 1953
- Genus Halochlorella P. Dangeard, 1966
- Genus Hegewaldia T. Pröschold, C. Bock, W. Luo & L. Krienitz, 2010
- Genus Helicosporidium D. Keilin, 1921
- Genus Heynigia C. Bock, T. Pröschold & L. Krienitz, 2010
- Genus Hindakia C. Bock, T. Pröschold & L. Krienitz, 2010
- Genus Kalenjinia L. Krienitz, C. Bock, K. Kotut & T. Pröschold, 2012
- Genus Keratococcus Pascher, 1915
- Genus Kermatia T. Kalina & M. Puncochárová, 1987
- Genus Leptochlorella J. Neustupa, Y. Němcová, J. Veselá, J. Steinová & P. Škaloud, 2013
- Genus Lewiniosphaera T. Pröschold & T. Darienko, 2020
- Genus Marasphaerium L. Krienitz, C. Bock, K. Kotut & T. Pröschold, 2012
- Genus Marinichlorella Z. Aslam, W. Shin, M.K. Kim, W.-T. Im & S.-T. Lee, 2007
- Genus Marvania F. Hindák, 1976
- Genus Masaia L. Krienitz, C. Bock, K. Kotut & T. Pröschold, 2012
- Genus Meyerella M.W. Fawley & K.P. Fawley in M.W. Fawley, K.P. Fawley & H.A. Owen, 2005
- Genus Micractinium Fresenius, 1858
- Genus Mucidosphaerium C. Bock, T. Pröschold & L. Krienitz, 2011
- Genus Muriella J.B. Petersen, 1932
- Genus Nannochloris Naumann, 1921
- Genus Nanochlorum C. Wilhelm, G. Eisenbeis, A. Wild & R. Zahn, 1982
- Genus Palmellochaete Korshikov, 1953
- Genus Parachlorella L. Krienitz, E.H. Hegewald, D. Hepperle, V.A.R. Huss, T. Rohr & M. Wolf, 2004
- Genus Phytelios Poche, 1913 accepted as Phythelios Frenzel, 1891
- Genus Phythelios Frenzel, 1891
- Genus Phythelius Schaudinn, 1896 accepted as Phythelios Frenzel, 1891
- Genus Planktochlorella P. Škaloud & Y. Němcová in Škaloud, Němcová, Pytela, Bogdanov, Bock & Pickinpaugh, 2014
- Genus Podohedra Düringer, 1958
- Genus Podohedriella F. Hindák, 1988
- Genus Prototheca W. Krüger in Zopf, 1894
- Genus Pseudochloris B. Somogyi, T. Felföldi & L. Vörös in Somogyi, Felföldi, Solymosi, Flieger, Márialigeti, Böddi & Vörös, 2013
- Genus Pseudosiderocelopsis Massalski, Mronzinska & Olech, 1999
- Genus Pumiliosphaera T. Darienko & T. Pröschold, 2015
- Genus Raphidonema Lagerheim, 1892
- Genus Siderocelis (Naumann) Fott, 1934
- Genus Siderocelopsis F. Hindák, 1988 accepted as Siderocelis (Naumann) Fott, 1934
- Genus Zoochlorella K. Brandt, 1881 accepted as Chlorella M. Beijerinck, 1890
- Family Chlorellales incertae sedis
- Family Dictyosphaeriaceae G.S. West, 1916 accepted as Chlorellaceae Brunnthaler, 1913
- Family Eremosphaeraceae accepted as Oocystaceae Bohlin, 1901
- Family Gloeotilaceae accepted as Chlorellaceae Brunnthaler, 1913
- Family Leptosiraceae
- Family Micractiniaceae accepted as Chlorellaceae Brunnthaler, 1913
- Family Oocystaceae Bohlin, 1901
- Order Microthamniales
- Order Oocystales accepted as Chlorellales
- Order Phyllosiphonales
- Order Prasiolales
- Order Schizogoniales accepted as Prasiolales
- Order Trebouxiales
- Order Trebouxiophyceae (awaiting allocation)
- Order Trebouxiophyceae incertae sedis
- 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 Sigmopollis R.W. Hedlund, 1965 †
- Genus Sphaerosiphon Schussnig, 1915
- Genus Tetraphycoides F. Cao, 1985 † accepted as Archaeophycus F. Wang, X. Zhang & R. Guo, 1983 †
- 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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