,---------------------------------- Chlamydia psittaci
                                      |
                                      |
                    ,-----------------|  Chlamydia
                    |                 |
                    |                 |
                    |                 `---------------------------------- Chlamydia trachomatis
                    |
                    |
  ,-----------------|  Eubacteria
  |                 |
  |                 |
  |                 |--------------------------------------------------- Borrelia burgdorferi
  |                 |
  |                 |
  |                 |                 ,---------------------------------- Bacteroides fragilis
  |                 |                 |
  |                 |                 |
  |                 |-----------------|  Bacteroidaceae
  |                 |                 |
  |                 |                 |
  |                 |                 `---------------------------------- Porphyromonas gingivalis
  |                 |
  |                 |
  |                 |                                   ,----------------- Microcystis aeruginosa
  |                 |                                   |
  |                 |                                   |
  |                 |                 ,-----------------|  Chroococcales
  |                 |                 |                 |
  |                 |                 |                 |
  |                 |                 |                 |----------------- Synechococcus sp.
  |                 |                 |                 |
  |                 |                 |                 |
  |                 |                 |                 `----------------- Synechocystis sp.
  |                 |                 |
  |                 |                 |
  |                 |-----------------|  Cyanobacteria
  |                 |                 |
  |                 |                 |
  |                 |                 |                 ,----------------- Anabaena sp.
  |                 |                 |                 |
  |                 |                 |                 |
  |                 |                 |-----------------|  Anabaena
  |                 |                 |                 |
  |                 |                 |                 |
  |                 |                 |                 `----------------- Anabaena variabilis
  |                 |                 |
  |                 |                 |
  |                 |                 `---------------------------------- Fremyella diplosiphon
  |                 |
  |                 |
  |                 |                 ,---------------------------------- gamma subdivision ---->
  |                 |                 |
  |                 |                 |
  |                 |-----------------|  Proteobacteria
  |                 |                 |
  |                 |                 |
  |                 |                 |---------------------------------- alpha subdivision ---->
  |                 |                 |
  |                 |                 |
  |                 |                 |---------------------------------- beta subdivision ---->
  |                 |                 |
  |                 |                 |
  |                 |                 |                 ,----------------- Myxococcus xanthus
  |                 |                 |                 |
  |                 |                 |                 |
  |                 |                 |-----------------|  delta subdivision
  |                 |                 |                 |
  |                 |                 |                 |
  |                 |                 |                 `----------------- Desulfovibrio vulgaris
  |                 |                 |
  |                 |                 |
  |                 |                 |                 ,----------------- Campylobacter jejuni
  |                 |                 |                 |
  |                 |                 |                 |
  |                 |                 |-----------------|  epsilon subdivision
  |                 |                 |                 |
  |                 |                 |                 |
  |                 |                 |                 `----------------- Helicobacter pylori
  |                 |                 |
  |                 |                 |
  |                 |                 `---------------------------------- Pseudomonas sp.
  |                 |
  |                 |
  |                 |                 ,---------------------------------- Actinomycetes ---->
  |                 |                 |
  |                 |                 |
  |                 |-----------------|  Firmicutes
  |                 |                 |
  |                 |                 |
  |                 |                 `---------------------------------- Low G+C gram-positive bacteria ---->
  |                 |
  |                 |
  |                 |--------------------------------------------------- Thermotoga maritima
  |                 |
  |                 |
  |                 `--------------------------------------------------- Thermus aquaticus
  |
  |
 -|  Universal Ancestor
  |
  |
  |                                                     ,----------------- Sulfolobus acidocaldarius
  |                                                     |
  |                                                     |
  |                                   ,-----------------|  Sulfolobus
  |                                   |                 |
  |                                   |                 |
  |                                   |                 `----------------- Sulfolobus solfataricus
  |                                   |
  |                                   |
  |                 ,-----------------|  Archaea
  |                 |                 |
  |                 |                 |
  |                 |                 `---------------------------------- Euryarchaeota ---->
  |                 |
  |                 |
  `-----------------|  Archaea and Eukarotae
                    |
                    |
                    |                 ,---------------------------------- Giardia lamblia
                    |                 |
                    |                 |
                    `-----------------|  Eukaryotae
                                      |
                                      |
                                      `---------------------------------- mitochondrial eukaryotes ---->