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.

[2] Several models have been proposed since and no consensus is reached at present as to the branching order of the major bacterial lineages.

Archaea + eukaryote Thermotogae Chloroflexi Deinococcus-Thermus Proteobacteria Cyanobacteria Firmicutes Actinobacteria Planctomycetes Chlamydiae Spirochaetes Bacteroidetes Chlorobi Despite the impact of the paper on bacterial classification, it was not a proposal for change of taxonomy.

[4] In 1987, Carl Woese, regarded as the forerunner of the molecular phylogeny revolution, divided Eubacteria into 11 divisions based on 16S ribosomal RNA (SSU) sequences, listed below.

The clade composed of Archaea and the nuclear genome of eukaryotes is called Neomura by T. Cavalier-Smith[17]

Atomic structure of the 30S ribosomal Subunit from Thermus thermophilus of which 16S makes up a part. Proteins are shown in blue and the single RNA strand in tan. [ 5 ]