Formal name | Informal names | Examples |
---|---|---|
Subkingdom Negibacteria* (invariably with acyl-ester phospholipid-containing outer membrane: OM) | ||
   Infrakingdom Glidobacteria* infraking. nov. (Description: gliding motility only; primitively lack flagella, endospores, and haem catalase III. Type order: Nostocales) | ||
Superdivision Eobacteria* superking. nov. (earlier infrakingdom and division [1]. Description: no lipopolysaccharide or diaminopimelic acid, TolC or TonB) | ||
Phylum Chlorobacteria | green non-sulphur bacteria | Â |
 | (Chloroflexi, Thermomicrobia, GNS group) | Dehalococcoides |
Phylum Hadobacteria | Deinococcus/Thermus group | Thermus |
Superdivision Cyanobacteria* superking. nov. (Description: flagella entirely absent; with lipopolysaccharide, diaminopimelic acid, oxygenic photosynthesis, TolC, TonB). | ||
Phylum Cyanobacteria | cyanobacteria, blue-green algae | Nostoc |
 |  | Synechococcus |
   Infrakingdom Eurybacteria* infraking. nov.1 (typically with endospores; external flagella or gliding motility) | ||
Phylum Eurybacteria* div. nov.1 | Classes: Selenobacteria* cl. nov.2 | Sporomusa |
 | incl. Heliobacteriales ord. nov. | Heliobacterium |
 | Fusobacteria cl. nov.3 | Leptotrichia |
 |  | Fusobacterium |
 | Togobacteria (Thermotogales) | Thermotoga |
   Infrakingdom Gracilicutes infraking. nov.4 (murein sacculus very thin or absent; no endospores) | ||
Phylum Spirochaetae | spirochaetes and leptospiras (endoflagella) | Treponema |
Phylum Sphingobacteria (fast gliding; mostly non-flagellate; unique MotB homologue – see text) | ||
Class Chlorobea | Chlorobi | Chlorobium |
Class Flavobacteria | CFB group and Fibrobacteres | Cytophaga |
Superphylum Exoflagellata (external rotary flagella with both L- and P-rings; no sulfonolipids) | ||
Phylum Proteobacteria | proteobacteria (flagella; sometimes gliding; always murein) | |
   Subphylum Rhodobacteria | purple bacteria; α-, β- and γ-proteobacteria | Escherichia |
 |  | Rhizobium, Spirillum |
   Subphylum Thiobacteria | δ- and ε-proteobacteria | Desulfovibrio |
 | (including gliding Myxobacteria) | Geobacter, Bdellovibrio |
 | plus Aquificales | Helicobacter, Aquifex |
   Subphylum Geobacteria | Deferribacteres, Chrysiogenetes and Acidobacteria groups | Geovibrio |
 |  | Acidobacterium |
Phylum Planctobacteria5 | Planctomycetales (flagella; no murein) and Chlamydiae/Verrucomicrobia group | Pirellula |
 |  | Chlamydia |
Subkingdom Unibacteria* (ancestrally with only a single cell surface membrane; absence of OM with acyl-ester phospholipids and of slime-secretion or pilus-based gliding motility) | ||
Phylum Posibacteria* | Gram-positive bacteria (ancestrally very thick murein with lipoprotein sortases; both lost only in Mollicutes) | |
   Subphylum Endobacteria6 | 'low-GC Gram-positives'6 + | Dictyoglomus |
 | i.e. Teichobacteria (murein) | Bacillus, Clostridium |
 | Mollicutes (no murein) | Mycoplasma |
   Subphylum Actinobacteria* | high-GC Gram-positives7 | Mycobacterium |
 |  | Streptomyces |
Phylum Archaebacteria | archaebacteria, archaea (isoprenoid ether lipids and N-linked glycoproteins; no murein or lipoprotein) | |
   Subphylum Euryarchaeota | euryarchaeotes (e.g. methanogens, halophiles) | Thermoplasma |
   Subphylum Crenarchaeota | crenarchaeotes | Sulfolobus |
 |  | Thermoproteales |