the root (no rank)
Bacteria (domain)
Proteobacteria (phylum)
Alphaproteobacteria (class)
Rhizobiales (order)
Rhizobiaceae (family)
Sinorhizobium (genus)
[hide inferior taxa]
Sinorhizobium fredii (species)
Sinorhizobium medicae (species)
Sinorhizobium meliloti (species)
Sinorhizobium sp. (species)