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{{Taxobox
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|fossil range = {{long fossil range|3500|0}}
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| regnum = [[Bacteria]]▼
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| subdivision_ranks = Orders▼
|phylum = '''Cyanobacteria'''
|phylum_authority = [[Roger Stanier|Stanier]], 1973
|subdivision = Taksonomi saat ini masih dalam revisi<ref name="Cyanophyceae cladistics">{{cite web |title=Cyanophyceae |url=http://www.accessscience.com/content/Cyanophyceae/175300 |work=Cyanophyceae |publisher=Access Science |accessdate=21 April 2011}}</ref><ref>
{{cite journal
|author=Ahoren Oren
|year=2004
|title=A proposal for further integration of the cyanobacteria under the Bacteriological Code
|journal=Int. J. Syst. Evol. Microbiol.
|volume=54
|pages=1895–1902
|doi=10.1099/ijs.0.03008-0
|pmid=15388760
|issue=Pt 5
}}
</ref>
*Bentuk Uniseluler
[[Chroococcales]] (subordo-Chamaesiphonales dan Pleurocapsales)
*Filamentous (dalam bentuk kolonial)
[[Nostocales]] (= Hormogonales atau Oscillatoriales)
*True-branching (budding over multiple axes)
[[Stigonematales]]
|synonyms =
*Myxophyceae <small>Wallroth, 1833</small>
*Phycochromaceae <small>Rabenhorst, 1865</small>
*Cyanophyceae <small>Sachs, 1874</small>
*Schizophyceae <small>Cohn, 1879</small>
*Cyanophyta <small>Steinecke, 1931</small>
*Oxyphotobacteria <small>Gibbons & Murray, 1978</small>
}}
'''Cyanobacteria''' {{IPAc-en|s|aɪ|ˌ|æ|n|oʊ|b|æ|k|ˈ|t|ɪər|i|ə}}, juga dikenal sebagai '''Cyanophyta''', is a [[filum]] [[bakteria]] yang mendapatkan kebutuhan energinya melalui [[fotosintesis]].<ref>{{cite web |first=brs |title=Life History and Ecology of Cyanobacteria |url=http://www.ucmp.berkeley.edu/bacteria/cyanolh.html |publisher=University of California Museum of Paleontology|accessdate=17 Juli 2012}}</ref> Nama "cyanobacteria" berasal dari warna bakteri ini ({{lang-el|κυανός (''kyanós'')}} = biru). Mereka sering disebut '''alga biru-hijau''' (tetapi beberapa mengklaim bahwa penamaan itu salah, cyanobacteria adalah [[prokariotik]] sedangkan [[alga]] seharusnya [[eukariotik]],<ref name="Allaby 92">{{cite encyclopedia |last=Allaby |first=M ed. |year=1992 |encyclopedia=The Concise Dictionary of Botany |publisher=Oxford University Press |location=Oxford |title=Algae}}</ref> although other definitions of algae encompass prokaryotic organisms).<ref>{{cite book |author=Lee, R. E. |year=2008 |title=Phycology |publisher=Cambridge University Press}}</ref>
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Dengan memproduksi [[gas]] [[oksigen]] sebagai hasil sampingan fotosintesis, cyanobacteria are thought to have converted the early [[reducing atmosphere]] into an [[redox|oxidizing]] one, causing the "rusting of the Earth"<ref>[[J. William Schopf|Schopf, J. W.]] (2012) [https://books.google.com/books?id=4oJ_vi27s18C&pg=PA17 "The fossil record of cyanobacteria"], pp. 15–36 in Brian A. Whitton (Eds.) ''Ecology of Cyanobacteria II: Their Diversity in Space and Time''. ISBN 9789400738553.</ref> and [[Great Oxygenation Event|dramatically changing]] the composition of life forms on Earth by stimulating [[biodiversity]] and leading to the near-extinction of [[anaerobic organism|oxygen-intolerant organisms]]. According to [[endosymbiotic theory]], the [[chloroplast]]s found in [[plants]] and [[eukaryote|eukaryotic]] [[algae]] evolved from cyanobacterial ancestors via [[endosymbiosis]].-->
== Bentuk ==
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