Natura - nature
   actualia - actual entities
     Mundus Plinius - physical world
       naturalia - natural bodies
         Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
           Domain Bacteria Woese et al. 2024
             Kingdom Pseudomonadati (Gibbons and Murray 1978) Oren and Göker 2024
               Phylum Pseudomonadotaᵀ Garrity et al. 2021
                 Class Betaproteobacteria Garrity et al. 2006
                   Order Rhodocyclales Garrity et al. 2006
                     Family Zoogloeaceae Boden et al. 2017
                       Genus Azoarcus Reinhold-Hurek et al. 1993
                         1 Azoarcus anaerobius Springer et al. 1998
                         2 Azoarcus buckelii Mechichi et al. 2002
                         3 Azoarcus communis Reinhold-Hurek et al. 1993
                         4 Azoarcus evansii Anders et al. 1995
                         5 Azoarcus indigens Reinhold-Hurek et al. 1993
                         6 Azoarcus toluclasticus Song et al. 1999
                         7 Azoarcus tolulyticus Zhou et al. 1995
                         8 Azoarcus toluvorans Song et al. 1999