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
- Phylum Acidobacteria
- Phylum Actinobacteria
- Phylum Aquificae
- Phylum Armatimonadetes
- Phylum Bacteria (awaiting allocation)
- Phylum Bacteria incertae sedis
- Phylum Bacteroidetes
- Phylum Balneolaeota
- Phylum Caldiserica
- Phylum Calditrichaeota
- Phylum Chlamydiae
- Phylum Chlorobi
- Phylum Chloroflexi
- Phylum Chrysiogenetes
- Phylum Cyanobacteria
- Class Cyanophyceae
- Order Acrescentida †
- Order Anagliphonida †
- Order Chamaesiphonales accepted as Synechococcales
- Order Chroococcales
- Order Chroococcidiopsidales
- Order Conophytonida †
- Order Cryptiida †
- Order Cupolida †
- Order Cyanophyceae (awaiting allocation)
- Order Decumbenta †
- Order Dermocarpales accepted as Pleurocapsales
- Order Entophysalidales accepted as Chroococcales
- Order Gloeobacterales
- Order Intricatida †
- Order Kussiellida †
- Order Minicolumellida †
- Order Ministomida †
- Order Nostocales
- Family Anabaenaceae accepted as Nostocaceae Eichler, 1886
- Family Aphanizomenonaceae Elenkin
- Genus Anabaenopsis V.V. Miller, 1923
- Genus Aphanizomenon C. Morren ex É. Bornet & C. Flahault, 1886
- Genus Chrysosporum E. Zapomělová, O. Skácelová, P. Pumann, R. Kopp & E. Janeček, 2012
- Genus Cuspidothrix P. Rajaniemi, J. Komárek, R. Willame, P. Hrouzek, K. Kaštovská, L. Hoffmann & K. Sivonen, 2005
- Genus Cyanospira Florenzano, Sili, Pelosi & Vincenzini, 1985 accepted as Neocyanospira E.A. Molinari-Novoa & M.D. Guiry in Molinari-Novoa et al., 2021
- Genus Cylindrospermopsis G. Seenayya & N. Subba Raju in T.V. Desikachary, 1972
- Genus Dolichospermum (Ralfs ex Bornet & Flahault) P. Wacklin, L. Hoffmann & J. Komárek, 2009
- Genus Limnanthe Kützing, 1843 accepted as Aphanizomenon C. Morren ex É. Bornet & C. Flahault, 1886
- Genus Limnochlide Kützing, 1843 accepted as Aphanizomenon C. Morren ex É. Bornet & C. Flahault, 1886
- Genus Neocyanospira E.A. Molinari-Novoa & M.D. Guiry in Molinari-Novoa et al., 2021
- Genus Raphidiopsis F.E. Fritsch & F. Rich, 1929
- Species Raphidiopsis brookii P.J. Hill, 1972
- Species Raphidiopsis curvata F.E. Fritsch & M.F. Rich, 1929
- Species Raphidiopsis indica R.N. Singh, 1942
- Species Raphidiopsis longsetae Eberly
- Species Raphidiopsis mediterranea Skuja, 1937
- Species Raphidiopsis setigera (Aptekarj) Eberly, 1966
- Species Raphidiopsis sinensia C.-C. Jao, 1951
- Species Raphidiopsis sinensis Jao
- Species Raphidiopsis tucomanica Kogan
- Genus Sphaerospermopsis Zapomělová, Jezberová, Hrouzek, Hisem, Reháková & Komárková, 2010
- Genus Sphaerospermum Zapomělová, Jezberová, Hrouzek, Hisem, Reháková & Komárková, 2009 accepted as Sphaerospermopsis Zapomělová, Jezberová, Hrouzek, Hisem, Reháková & Komárková, 2010
- Genus Umezakia M. Watanabe, 1987
- Family Borzinemataceae Geitler, 1942 accepted as Tolypothrichaceae Hauer, Mareš, Bohunická, Johansen & Berrendero-Gomez, 2014
- Family Caposiraceae accepted as Capsosiraceae (Geitler) Elenkin
- Family Capsosiraceae (Geitler) Elenkin
- Family Chlorogloeopsaceae accepted as Chlorogloeopsidaceae (Mitra) Mitra & Pandey, 1967
- Family Chlorogloeopsidaceae (Mitra) Mitra & Pandey, 1967 accepted as Hapalosiphonaceae Elenkin, 1916
- Family Fischerellaceae accepted as Hapalosiphonaceae Elenkin, 1916
- Family Fortieaceae
- Family Gloeotrichiaceae J. Komárek, J. Kaštovský, J. Mareš & J.R. Johansen, 2014
- Family Godleyaceae Hauer, Mareš, Bohunická, Johansen & Berrendero-Gomez, 2014
- Family Hapalosiphonaceae Elenkin, 1916
- Family Kenellaceae Korde, 1973 † accepted as Zheleznayaceae E.A. Molinari-Novoa & M.D. Guiry, 2021 †
- Family Loefgreniaceae accepted as Hapalosiphonaceae Elenkin, 1916
- Family Loriellaceae accepted as Hapalosiphonaceae Elenkin, 1916
- Family Mastigocladaceae Geitler, 1925 accepted as Hapalosiphonaceae Elenkin, 1916
- Family Mastigocladopsidaceae accepted as Symphyonemataceae Hoffmann, Komárek & Kaštovský
- Family Microchaetaceae Lemmermann, 1907 accepted as Rivulariaceae Kützing ex Bornet & Flahault
- Family Nodulariaceae Elenkin, 1916
- Family Nostocaceae Eichler, 1886
- Family Nostocales (awaiting allocation)
- Family Nostochopsaceae accepted as Hapalosiphonaceae Elenkin, 1916
- Family Nostochopsidaceae Geitler, 1925 accepted as Hapalosiphonaceae Elenkin, 1916
- Family Proauloporaceae † accepted as Rivulariaceae Kützing ex Bornet & Flahault
- Family Pulvinulariaceae accepted as Stigonemataceae (Bornet & Flahault) Borzi, 1892
- Family Rivulariaceae Kützing ex Bornet & Flahault
- Family Scytonemataceae Rabenhorst ex Bornet & Flahault
- Family Sirosiphoniaceae accepted as Stigonemataceae (Bornet & Flahault) Borzi, 1892
- Family Stigonemataceae (Bornet & Flahault) Borzi, 1892
- Family Symphyonemataceae Hoffmann, Komárek & Kaštovský
- Family Tolypothrichaceae Hauer, Mareš, Bohunická, Johansen & Berrendero-Gomez, 2014
- Family Zheleznayaceae E.A. Molinari-Novoa & M.D. Guiry, 2021 †
- Genus Anhuithrix K. Pang et al., 2018 †
- Genus Polythrichoides T.N. Hermann in B.V. Timofeev, 1974 †
- Genus Polytrichoides T.N. Hermann, 1974 † accepted as Polythrichoides T.N. Hermann in B.V. Timofeev, 1974 †
- Order Oscillatoriales
- Order Pleurocapsales
- Order Porostromata † accepted as Oscillatoriales
- Order Prochlorales accepted as Synechococcales
- Order Prochlorales accepted as Synechococcales
- Order Pseudanabaenales accepted as Synechococcales
- Order Sarmaellales †
- Order Spirulinales
- Order Stigonematales accepted as Nostocales
- Order Synechococcales
- Family Porostromataceae † accepted as Oscillatoriales
- Genus Acaciella Walter in Preiss, 1972 †
- Genus Actucellularia K. Grey & K.L. Cotter, 1996 †
- Genus Alcheringa Walter, 1972 †
- Genus Asterosphaeroides Zhuravleva, 1968 †
- Genus Bactrophycus Y. Zhang, 1985 †
- Genus Callosicoccus Y. Zhang, 1985 †
- Genus Carniphytes B. Senowbari-Daryan, 2013 †
- Genus Caryosphaeroides J.W. Schopf, 1968 †
- Genus Collenia C.D. Walcott, 1914 †
- Genus Crassitubus Liu, Xiao, Yin, Zhou, Gao & Tang, 2008 †
- Genus Cryptozoon J. Hall, 1883 †
- Genus Cryptozoön J. Hall, 1883 † represented as Cryptozoon J. Hall, 1883 †
- Genus Cyanoleptophycus E.A. Molinari-Novoa & M.D. Guiry, 2021 †
- Genus Elleria M.R. Walter in Walter, Krylov & Preiss, 1979 †
- Genus Filamentella H.D. Pflug, 1965 †
- Genus Frutexites V.P. Maslov, 1960 †
- Genus Graviglomus J.W. Green, A.H. Knoll & K. Swett, 1988 †
- Genus Kulparia Preiss & Walter in Walter, 1972 †
- Genus Leptophycus J.H. Johnson, 1940 † accepted as Cyanoleptophycus E.A. Molinari-Novoa & M.D. Guiry, 2021 †
- Genus Palmelloidea H.-J. Chu & B.-T. Wu, 1984
- Genus Parenchymodiscus J.W. Green, A.H. Knoll & K. Swett, 1988 †
- Genus Perulagranum J.W. Green, A.H. Knoll & K. Swett, 1988 †
- Genus Pseudotielingella Y.Z. Liang & R.C. Tsao in Tsao & Liang, 1974 †
- Genus Quadratitubus Xue, Tang & Yu, 1992 †
- Genus Rhyniotaxillus M. Krings & V.N. Sergeev, 2019 †
- Genus Salome Knoll, 1982 †
- Genus Segosia Butin, 1966 †
- Genus Sinocyclocyclicus Xue, Tang & Yu, 1992 †
- Genus Thylacocausticus J.W. Green, A.H. Knoll & K. Swett, 1988 †
- Genus Vermioidea H.-J. Chu & B.-T. Wu, 1984
- Genus Yukonosphaeridion S.M. Awramik in Allison & Awramik, 1989 †
- Class Prochlorophyceae accepted as Cyanophyceae
- Genus Bogutschanophycus K.B. Korde, 1954 † accepted as Nuia V.P. Maslov, 1954 †
- Genus Nuia V.P. Maslov, 1954 †
- Phylum Deferribacteres
- Phylum Deinococcus-Thermus
- Phylum Dictyoglomi
- Phylum Elusimicrobia
- Phylum Fibrobacteres
- Phylum Firmicutes
- Phylum Fusobacteria
- Phylum Gemmatimonadetes
- Phylum Kiritimatiellaeota
- Phylum Lentisphaerae
- Phylum Myxobacteria accepted as Proteobacteria
- Phylum Nitrospira
- Phylum Omnibacteria accepted as Bacteria
- Phylum Planctomycetes
- Phylum Prochlorophyta accepted as Cyanobacteria
- Phylum Proteobacteria
- Phylum Rhodothermaeota
- Phylum Schizophyta accepted as Bacteria
- Phylum Spirochaetae
- Phylum Spirochaetes accepted as Spirochaetae
- Phylum Synergistetes
- Phylum Tenericutes
- Phylum Thermodesulfobacteria
- Phylum Thermomicrobia accepted as Chloroflexi
- Phylum Thermotogae
- Phylum Verrucomicrobia
- Class Myxobacteria (awaiting allocation) accepted as Bacteria
- Genus Animikiea E.S. Barghoorn in E.S. Barghoorn & S.A. Tyler, 1965 †
- Genus Coleobacter J.H. Oehler, 1977 †
- Genus Concentrisphaera G. Burmann, 1998 †
- Genus Crassosphaera G. Burmann, 1998 †
- Genus Eoastrion E.S. Barghoorn in Barghoorn & Tyler, 1965 †
- Genus Eobacterium E.S. Barghoorn & J.W. Schopf, 1966
- Genus Fabiformis V.G. Pyatiletov, 1988 †
- Genus Favososphaera G. Burmann, 1972 †
- Genus Ferrimonilis J.H. Oehler, 1977 †
- Genus Globus G. Vidal in Moczydłowska & Vidal, 1988 †
- Genus Gunflintia E.S. Barghoorn in Barghoorn & Tyler, 1965 †
- Genus Kakabekia E.S. Barghoorn in Barghoorn & Tyler, 1965 †
- Genus Leptoteichos A.H. Knoll, E.S. Barghoorn & S.M. Awramik, 1978 †
- Genus Microagglomeratus S.M. Awramik in Allison & Awramik, 1989 †
- Genus Phaeostrepte Skuja ex T. Willén, 1992
- Genus Ramacia J.H. Oehler, 1977 †
- Genus Tenuisphaera G. Burmann, 1998 †
- Kingdom Chromista
- Kingdom Fungi
- Kingdom Plantae
- Kingdom Protista accepted as Protozoa
- Kingdom Protozoa
- Kingdom Viruses
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