nitrosomonas communis nitrosomonas communis nitrosomonas communis is an ammonia-oxidizing, gram-negative, bacterium from the genus of nitrosomonas which was isolated from the rhizoplane of the reed (phragmites communis) from a wastewater treatment plant. nitrosomonas communis scientific classification domain: bacteria phylum: pseudomonadota class: betaproteobacteria order: nitrosomonadales family: nitrosomonadaceae genus: nitrosomonas species: n. communis binomial name nitrosomonas communiskoops et al. 2001 type strain nm 2