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Bacterium

Bacteria
Temporal range: Archean or earlier – present
EscherichiaColi NIAID.jpg
Scanning electron micrograph of Escherichia coli rods
Scientific classification
Domain: Bacteria
Woese, Kandler & Wheelis, 1990
Phyla

Actinobacteria (high-G+C)
Firmicutes (low-G+C)
Tenericutes (no wall)

Aquificae
Bacteroidetes/FibrobacteresChlorobi (FCB group)
Deinococcus-Thermus
Fusobacteria
Gemmatimonadetes
Nitrospirae
PlanctomycetesVerrucomicrobia/Chlamydiae (PVC group)
Proteobacteria
Spirochaetes
Synergistetes

  • Unknown / ungrouped

Acidobacteria
Chloroflexi
Chrysiogenetes
Cyanobacteria
Deferribacteres
Dictyoglomi
Thermodesulfobacteria
Thermotogae

Synonyms

Eubacteria Woese & Fox, 1977


Actinobacteria (high-G+C)
Firmicutes (low-G+C)
Tenericutes (no wall)

Aquificae
Bacteroidetes/FibrobacteresChlorobi (FCB group)
Deinococcus-Thermus
Fusobacteria
Gemmatimonadetes
Nitrospirae
PlanctomycetesVerrucomicrobia/Chlamydiae (PVC group)
Proteobacteria
Spirochaetes
Synergistetes

Acidobacteria
Chloroflexi
Chrysiogenetes
Cyanobacteria
Deferribacteres
Dictyoglomi
Thermodesulfobacteria
Thermotogae

Eubacteria Woese & Fox, 1977

Bacteria (Listeni/bækˈtɪəriə/; common noun bacteria, singular bacterium) constitute a large domain of prokaryotic microorganisms. Typically a few micrometres in length, bacteria have a number of shapes, ranging from spheres to rods and spirals. Bacteria were among the first life forms to appear on Earth, and are present in most of its habitats. Bacteria inhabit soil, water, acidic hot springs, radioactive waste, and the deep portions of Earth's crust. Bacteria also live in symbiotic and parasitic relationships with plants and animals.


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Wikipedia

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