the root (no rank)
Bacteria (domain)
Proteobacteria (phylum)
Alphaproteobacteria (class)
Rhodobacterales (order)
Rhodobacteraceae (family)
Rhodovulum (genus)
[hide inferior taxa]
Rhodovulum sp. (species)
Rhodovulum strictum (species)
Rhodovulum sulfidophilum (species)