There are several models of the Branching order of bacterial phyla, one of these was proposed in 2002 and 2004 by Thomas Cavalier-Smith

Thomas Cavalier-Smith

Professor Thomas Cavalier-Smith , FRS, FRSC, NERC Professorial Fellow, is a Professor of Evolutionary Biology in the Department of Zoology, at the University of Oxford...

. In this frame of work, the branching order of the major lineage of bacteria are determined based on some morphological characters, such as cell wall structure, and not based on the molecular evidence (molecular phylogeny).

Whereas modern molecular studies point towards the root of the tree of life being between a monophyletic Bacteria and Archaea+Eukarya (Neomura

Neomura

Neomura is a clade composed of the two domains of life of Archaea and Eukaryota. The group was first proposed by Thomas Cavalier-Smith and its name means "new walls"; so called because it is thought to have evolved from Bacteria, and one of the major changes was the replacement of peptidoglycan...

), in the Cavalier-Smith theory, the last common ancestor (cenansestor) was a Gram-negative diderm bacterium with peptidoglycan, while Archaea and Eukaryotes stem from Actinobacteria

Actinobacteria

Actinobacteria are a group of Gram-positive bacteria with high guanine and cytosine content. They can be terrestrial or aquatic. Actinobacteria is one of the dominant phyla of the bacteria....

.

See also

• Branching order of bacterial phyla (Woese, 1987)
  Branching order of bacterial phyla (Woese, 1987)
  There are several models of the Branching order of bacterial phyla, one of these was proposed in 1987 paper by Carl Woese.The branching order proposed by Carl Woese was based on molecular phylogeny, which was considered revolutionary as all preceding models were based on discussions of morphology....
  
  
• Branching order of bacterial phyla (Rappe and Giovanoni, 2003)
  Branching order of bacterial phyla (Rappe and Giovanoni, 2003)
  There are several models of the Branching order of bacterial phyla, the most cited of these was proposed in 1987 paper by Carl Woese. This cladogram was later expanded by Rappe and Giovanoni in 2003 to include newly discovered phyla.-See also:...
  
  
• Branching order of bacterial phyla after ARB Silva Living Tree
• Branching order of bacterial phyla (Ciccarelli et al., 2006)
  Branching order of bacterial phyla (Ciccarelli et al., 2006)
  There are several models of the Branching order of bacterial phyla, one of these was proposed in 2006 by Ciccarelli et al. for their iTOL project.This tree is based on a concatenated set of conserved protein and not 16S rRNA There are several models of the Branching order of bacterial phyla, one of...
  
  
• Branching order of bacterial phyla (Battistuzzi et al.,2004)
  Branching order of bacterial phyla (Battistuzzi et al.,2004)
  There are several models of the Branching order of bacterial phyla, one of these was proposed in 2004 by Battistuzzi and Hedges,, note the coinage of the taxa Terrabacteria and Hydrobacteria.-See also:* Branching order of bacterial phyla...
  
  
• Branching order of bacterial phyla (Gupta, 2001)
  Branching order of bacterial phyla (Gupta, 2001)
  There are several models of the Branching order of bacterial phyla, one of these was proposed in 2001 by Gupta based on conserved indels or protein, termed "protein signatures", an alternative approach to molecular phylogeny. Some problematic exceptions and conflicts are present to these conserved...
  
  
• Branching order of bacterial phyla (Cavalier-Smith, 2002)
  Branching order of bacterial phyla (Cavalier-Smith, 2002)
  There are several models of the Branching order of bacterial phyla, one of these was proposed in 2002 and 2004 by Thomas Cavalier-Smith. In this frame of work, the branching order of the major lineage of bacteria are determined based on some morphological characters, such as cell wall structure,...