is a species of the class Betaproteobacteria in the family Nitrosomonadaceae and order Nitrosomonadales.
Nitrosomonas aestuarii
Nitrosomonas communis
Nitrosomonas europaea
Nitrosomonas eutropha
Nitrosomonas halophila
Nitrosomonas marina
Nitrosomonas nitrosa
Nitrosomonas oligotropha
Nitrosomonas ureae