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
- Family Actinochloridaceae Korshikov, 1953
- Family Asteromonadaceae
- Family Astrephomenaceae accepted as Goniaceae (Pascher) Pascher, 1931
- Family Carteriaceae Pascher accepted as Chlamydomonadaceae
- Family Centromonadaceae accepted as Chlamydomonadaceae
- Family Chaetochloridaceae accepted as Tetrasporaceae V.B. Wittrock, 1872
- Family Characiochloridaceae Skuja, 1948
- Family Characiosiphonaceae
- Family Chlamidomonadidae accepted as Chlamydomonadaceae
- Family Chlamydomonadaceae
- Family Chlamydomonadales (awaiting allocation)
- Family Chlorangiaceae Lemmermann accepted as Chlorangiellaceae Bourrelly ex Fott
- Family Chlorangiellaceae Bourrelly ex Fott
- Family Chlorangiopsidaceae accepted as Chlorangiellaceae Bourrelly ex Fott
- Family Chlorcoronaceae accepted as Spondylomoraceae Korshikov, 1923
- Family Chlorochytriaceae
- Family Chlorococcaceae
- Genus Alvikia S. Watanabe & L.A. Lewis, 2017
- Genus Apodochloris Komárek, 1959
- Genus Ascochloris H.C. Bold & F.J. MacEntee, 1974
- Genus Athroocystis W. West & G. West, 1897
- Genus Axilococcus T.R. Deason & W.R. Herndon, 1989
- Genus Axilosphaera E.R. Cox & T.R. Deason, 1968
- Genus Bernardinella R. Chodat, 1921
- Genus Borgea G.M. Smith, 1922
- Genus Borodinellopsis R.F. Dykstra, 1971
- Genus Capsochloris P.J.L. Dangeard, 1966
- Genus Chloracervus P.J.L. Dangeard, 1966
- Genus Chlorellopsis Kol & Chodat, 1934
- Genus Chlorococcopsis S. Watanabe & G.L. Floyd, 1990
- Genus Chlorococcum Meneghini, 1842
- Genus Chlorococcus accepted as Chlorococcum Meneghini, 1842
- Genus Chlorohippotes R.H. Thompson ex R.H. Thompson & P. Timpano, 1984
- Genus Chlorolunula P.J.L. Dangeard, 1966
- Genus Chlorozebra Reisigl, 1969
- Genus Closteridium Reinsch, 1888
- Genus Coccochlorum accepted as Chlorococcum Meneghini, 1842
- Genus Colossotetrahedrion Xue, Tang, Yu & Zhou, 1995 † accepted as Parapandorina Xue, Tang, Yu & Zhou, 1995 †
- Genus Cryococcus Kol & F. Chodat, 1934
- Genus Cystococcus Naegeli, 1849
- Genus Cystomonas Ettl & Gaertner, 1987
- Genus Ectogeron P.-A. Dangeard, 1947
- Genus Embryosphaera Trevisan, 1848
- Genus Emergococcus W.W. Miller, 1921
- Genus Emergosphaera W.W. Miller, 1921
- Genus Eremotyle L. Geitler, 1952 accepted as Chlorochytrium Cohn, 1872
- Genus Eubrownia S. Watanabe & L.A. Lewis, 2017
- Genus Fasciculochloris R.J. McLean & Trainor, 1965
- Genus Ferricystis F. Hindák, 1988
- Genus Heterotetracystis E.R. Cox & T.R. Deason, 1968
- Species Heterotetracystis akinetos Ed.R. Cox & T.R. Deason, 1968
- Species Heterotetracystis intermedia Ed.R. Cox & T.R. Deason, 1968
- Species Heterotetracystis macrogranulosa Ed.R. Cox & T.R. Deason, 1968 accepted as Heterotetracystis akinetos Ed.R. Cox & T.R. Deason, 1968
- Genus Kentrosphaeropsis V.M. Andreyeva & O.V. Gavrilova, 2000
- Genus Korsikovella Valkanov, 1964 accepted as Valkanoviella P. Bourrelly, 1965
- Genus Koršikovella Valkanov, 1964 accepted as Valkanoviella P. Bourrelly, 1965
- Genus Lautosphaeria T.R. Deason & W.R. Herndon, 1989
- Genus Lobococcus Reisigl
- Genus Menzbierella W.W. Miller, 1921
- Genus Nannokloster Pascher, 1915
- Genus Nautococcus Korshikov, 1926
- Genus Neospongiococcum Deason, 1971
- Genus Octogoniella Pascher, 1930
- Genus Oophila F.D. Lambert ex N. Wille in A. Engler & K. Prantl, 1909
- Genus Palaeocystis ? F. Wang & Q. Luo, 1984 †
- Genus Parachlorococcum S. Watanabe & L.A. Lewis, 2017
- Genus Phaseolaria Printz, 1921
- Genus Plaesiodictyon W. Wille, 1970 †
- Genus Pseudodictyococcus V.M. Andreyeva, 1995
- Genus Pseudoplanophila H. Ettl & G. Gärtner, 1987
- Genus Pseudospongiococcum Gromov & Mamkaeva, 1974
- Genus Pseudotrochiscia Vinatzer, 1975
- Genus Pulchrasphaera Deason, 1967
- Genus Radiosphaera J.W. Snow in Ward & Whipple, 1918
- Genus Sclerococcus P.K. Maithy & O.N. Bhargava, 1982
- Genus Signiosphaera P.A. Broady, 1977 accepted as Pseudodictyochloris Vinatzer, 1975
- Genus Skujaster D.G. Vodenicarov, 1989
- Genus Spongiochloris Starr, 1955
- Genus Spongiococcum Deason, 1959
- Genus Stenoplana Tereg, 1923
- Genus Symbiococcum M. Rahat & V. Reich, 1989
- Genus Telmatoskene Fott, 1957
- Genus Tetracystis R.M. Brown, Jr. & H.C. Bold, 1964
- Genus Tetraëdron Kützing, 1845 represented as Tetraedron Kützing, 1845
- Genus Ulotrichella Iyengar, 1975
- Genus Valkanoviella P. Bourrelly, 1965
- Family Chlorosarcinaceae Bourrelly ex Groover & Bold, 1969
- Family Chlorosphaeraceae accepted as Chlorosarcinaceae Bourrelly ex Groover & Bold, 1969
- Family Dunaliellaceae T. Christensen, 1967
- Family Endosphaeraceae accepted as Chlorochytriaceae
- Family Gloeococcaceae accepted as Palmellopsidaceae Korshikov, 1953
- Family Gloeodendraceae Korshikov, 1953 accepted as Palmellopsidaceae Korshikov, 1953
- Family Goniaceae (Pascher) Pascher, 1931
- Family Haematococcaceae
- Family Heleochloridaceae Fott, 1974 accepted as Sphaerocystidaceae
- Family Hormotilaceae
- Family Hypnomonadaceae
- Family Nautococcaceae accepted as Chlorococcaceae
- Family Palmellaceae Decaisne, 1842
- Family Palmellopsidaceae Korshikov, 1953
- Family Phacotaceae Francé, 1894
- Family Pleurastraceae K.R. Mattox & K.D. Stewart, 1984
- Family Protosiphonaceae
- Family Raciborskiellaceae accepted as Wislouchiaceae E.A. Molinari-Novoa & M.D. Guiry, 2021
- Family Rhodochytriaceae accepted as Chlorochytriaceae
- Family Sphaerocystidaceae
- Family Sphaerodictyaceae
- Family Spondylomoraceae Korshikov, 1923
- Family Spondylomoridae accepted as Spondylomoraceae Korshikov, 1923
- Family Stephanosphaeraceae accepted as Haematococcaceae
- Family Tetrabaenaceae H. Nozaki & M. Itoh, 1994
- Family Tetracystaceae accepted as Chlorococcaceae
- Family Tetrasporaceae V.B. Wittrock, 1872
- Family Volvocaceae
- Family Wislouchiaceae E.A. Molinari-Novoa & M.D. Guiry, 2021
- Genus Adglutina D. Barcytė, M. Pusztai, P. Škaloud & M. Eliáš, 2022
- Genus Chloropteridella P.C. Silva, 1970
- Genus Chloropteris Pascher, 1932 accepted as Chloropteridella P.C. Silva, 1970
- Genus Diplochloris Korshikov, 1939
- Genus Edaphochlamys T. Pröschold & T. Darienko, 2018
- Genus Ettlia J. Komárek, 1989
- Genus Hapalochloris T. Nakada in Nakada & Tomita, 2017
- Genus Latisphaera G.R. Licari, 1978 †
- Genus Lobosphaeropsis H. Reisigl, 1969
- Genus Maculosphaera G.R. Licari, 1978 †
- Genus Muriellopsis Reisigl, 1964
- Genus Palaeastrum N.J. Butterfield in Butterfield et al., 1994 †
- Genus Tetraflagellochloris L. Barsanti & A. Barsanti in Barsanti et al., 2013
- Genus Tetrapteromonas J. Ruinen, 1938
- Genus Volvoximorphites L.M. Yin & Z.P. Li, 1978 †
- 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
- 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 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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