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bacteria_taxonomy

a brief taxonomy of bacteria

introduction

  • bacteria were the earliest forms of prokaryotes (organisms that lack a cell nucleus), it is thought the first to evolve were the Gram +ve bacteria (these do not have a bacterial outer membrane), then the Gram -ves (which do have an outer membrane).
  • it is thought that the group of organisms classed in the domain Archaea evolved later and separately from bacteria and although they look like bacteria (particularly, Gram +ve bacteria), have different metabolic pathways and genes that are more similar to eukaryota.
  • the classification of archaea, and of prokaryotes in general, is a rapidly moving and contentious field.
  • it is thought the earliest prokaryotic organisms that evolved were related to the Gram-positive bacteria and that Archaea evolved from Gram-positive bacteria in response to the antibiotic selection pressure (from the antibiotics produced by Gram +ve bacteria).
  • the following taxonomy is grouped into Phyla then:
    • Class
      • Order (suffix ales)
        • Family (suffix aceae)

Gram +ve bacteria

Firmicutes

  • Bacilli
  • Clostridia
    • Clostridiales
    • Halanaerobiales
    • Thermoanaerobacterales
    • Natranaerobiales
  • Tenericutes/Mollicutes
    • Mycoplasmatales
    • Entomoplasmatales
    • Anaeroplasmatales
    • Acholeplasmatales
    • Haloplasmatales
  • Negativicutes
    • Selenomonadales
  • Erysipelotrichi
    • Erysipelotrichiales

Actinobacteria

  • Actinomycetales
  • Bifidobacteriales
  • Acidimicrobiales
  • Coriobacteriales
  • Nitriliruptorales
  • Rubrobacterales
  • Thermoleophilales
  • Solirubrobacterales

Gram -ve bacteria

Terrabacteria

  • Eobacteria
  • Cyanobacteria
  • Thermodesulfobacteria
  • thermophiles

Proteobacteria

  • Alpha
    • Caulobacterales
    • Kiloniellales
    • Kordiimonadales
    • Parvularculales
    • Rhizobiales
    • Rhodobacterales
    • Rhodospirillales
    • Rickettsiales
    • Sneathiellales
    • Sphingomonadales
  • Beta
    • Burkholderiales
    • Hydrogenophilales
    • Methylophilales
    • Neisseriales
    • Nitrosomonadales
    • Procabacteriales
    • Rhodocyclales
  • Gamma
    • Acidithiobacillales
    • Aeromonadales
    • Alteromonadales
    • Cardiobacteriales
    • Chromatiales
    • Enterobacteriales
    • Legionellales
    • Methylococcales
    • Pseudomonadales
  • Delta
    • Bdellovibrionales
    • Desulfarculales
    • Desulfobacterales
    • Desulfovibrionales
    • Desulfurellales
    • Desulfuromonadales
    • Myxococcales
    • Syntrophobacterales
  • Epsilon
    • Campylobacterales
    • Nautiliales

BV4

  • Spirochaetes
    • Spirochaetes
  • Sphingobacteria
    • Fibrobacteres
    • Chlorobi
    • Bacteroidetes
  • Planctobateria
    • Chlamydiae
    • Verrucomicrobia
    • Planctomycetes
  • other Gram negative
    • Acidobacteria
    • Chrysiogenetes
    • Deferribacteres
    • Fusobacteria
    • Gemmatimonadetes
    • Nitrospirae
    • Synergistetes
    • Dictyoglomi
    • Lentisphaerae
bacteria_taxonomy.txt · Last modified: 2019/06/26 17:35 (external edit)