Bacteria
This article is about the microorganisms. For the genus, see Bacterium (genus). For other uses, see Bacteria (disambiguation). A domain of prokaryotes – single celled organisms without a nucleus Bacteria Temporal range: Archean or earlier – present Had'n Archean Proterozoic Pha. Scanning electron micrograph of Escherichia coli rods Scientific classification Domain: Bacteria Woese, Kandler & Wheelis, 1990 [1] Phyla Acidobacteria Actinobacteria Aquificae Armatimonadetes Bacteroidetes Caldiserica Chlamydiae Chlorobi Chloroflexi Chrysiogenetes Coprothermobacterota [2] Cyanobacteria Deferribacteres Deinococcus-Thermus Dictyoglomi Elusimicrobia Fibrobacteres Firmicutes Fusobacteria Gemmatimonadetes Lentisphaerae Nitrospirae Planctomycetes Proteobacteria Spirochaetes Synergistetes Tenericutes Thermodesulfobacteria Thermotogae Verrucomicrobia Synonyms Eubacteria Woese & Fox, 1977 [3] Bacteria ( / b æ k ˈ t ɪər i ə /...