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 Rhodocyclaceaeᵀ Garrity et al. 2006
                       01 Genus Azospira Reinhold-Hurek and Hurek 2000
                       02 Genus Azovibrio Reinhold-Hurek and Hurek 2000 [monotypic]
                       03 Genus Oryzomicrobium Liu et al. 2017
                       04 Genus Propionivibrio Tanaka et al. 1991
                       05 Genus Rhodocyclusᵀ Pfennig 1978 (Approved Lists 1980)
                       06 Genus Rugosibacter Corteselli et al. 2017
                       07 Genus Viridibacterium Kang et al. 2025
                       08 Genus "Dechlorobacter" Thrash et al. 2010 nom. inval.
                       09 Genus "Candidatus Accumulibacter" Hesselmann et al. 2020
                       10 Genus "Candidatus Proximibacter" Petriglieri et al. 2022 nom. pro-inval.