the root (no rank)
Bacteria (domain)
Proteobacteria (phylum)
Alphaproteobacteria (class)
Rhizobiales (order)
Hyphomicrobiaceae (family)
Azorhizobium (genus)
[hide inferior taxa]
Azorhizobium caulinodans (species)
Azorhizobium sp. (species)