the root (no rank)
Bacteria (domain)
Proteobacteria (phylum)
Betaproteobacteria (class)
Nitrosomonadales (order)
Nitrosomonadaceae (family)
Nitrosomonas (genus)
[hide inferior taxa]
Nitrosomonas cryotolerans (species)
Nitrosomonas europaea (species)
Nitrosomonas sp. (species)