Natura - nature
   actualia - actual entities
     Mundus Plinius - physical world
       naturalia - natural bodies
         [crown] Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
           Domain Bacteria Woese et al. 1990 [paraphyletic?]
             Superphylum "Proteobacteria" Craig et al. 2010
               Phylum "Alphaproteobacteria" Garrity et al., 2006 [monotypic]
                 Class Alphaproteobacteriaᵀ Garrity et al. 2006
                   Order Rhizobiales Kuykendall 2006
                     Family Phyllobacteriaceae Mergaert and Swings 2006
                       Genus Nitratireductor Labbé et al. 2004
                         1 Nitratireductor aquibiodomusᵀ Labbé et al. 2004
                         2 Nitratireductor basaltis Kim et al. 2009
                         3 Nitratireductor kimnyeongensis Kang et al. 2009
                         4 Nitratireductor aquimarinus Jang et al. 2011
                         5 Nitratireductor indicus Lai et al. 2011
                         6 Nitratireductor pacificus Lai et al. 2011