Table 1.

An overview of the major rearrangements and updates in the taxonomy of Burkholderia.

Year	Finding	Details	Reference
1942	First isolation of Burkholderia	Originally named Phytomonas caryophylli; then Pseudomonas caryophylli	[5]
1992	A new Burkholderia genus was proposed	The new genus comprised seven species from the genus Pseudomonas	[8]
2011	A second genus (Caballeronia) was suggested	Based on phylogenetic analysis of multiple genes and comparative genomics; however, the evidence was not sufficient to confirm the new grouping	[15]
2014	The genus Paraburkholderia was proposed	Based on the analysis of conserved sequence in/dels	[18]
2016	Inclusion of several species in the Paraburkholderia genus and establishment of the Caballeronia genus	Eleven species were reclassified as Paraburkholderia and 14 species were transferred to the newly established Caballeronia genus	[19]
2017	Burkholderia andropogonis was separated in a newly proposed genus as Robbsia andropogonis	Based on multilocus sequence, 16S rRNA gene phylogeny, and average nucleotide identity analyses, as well as tetranucleotide signature frequency and percentage of conserved proteins	[20]
2017	Confirmation of the genetic boundaries among the 4 established groups and suggestion of a fifth division: Paraburkholderia rhizoxinica	Five groups (Burkholderia sensu stricto, Paraburkholderia, Caballeronia, Robbsia, Paraburkholderia rhizoxinica) were separated based on maximum likelihood phylogenies using the amino acid and nucleotide sequence of 106 conserved proteins	[21]
2018	Two novel genera (Mycetohabitans and Trinickia) were proposed	Based on whole-genome comparative study and phylogenetic analysis of conserved genes	[22]