procaryotes
   Domain Bacteria Woese et al. 1990 stat. inval. see Domain Bacteria Woese et al. 2024
     Phylum Proteobacteria Garrity and Holt 2001 nom. nud. see Phylum Proteobacteria Garrity et al. 2005 stat. inval.
       Class "Betaproteobacteria" "Garrity and Holt 2001" nom. nud. see Class Betaproteobacteria Garrity et al. 2006
         Order "Nitrosomonadales" "Garrity and Holt 2001" nom. nud. see Order Nitrosomonadales Garrity et al. 2006 nom. illeg.
           Family "Nitrosomonadaceae" "Garrity and Holt 2001" nom. nud. see Family Nitrosomonadaceae Garrity et al. 2006
             Genus Nitrosomonas Winogradsky 1892 (Approved Lists 1980) nom. cons.