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
                   01 Genus Chitinivorax Chen et al. 2012, incertae sedis [monotypic]
                   02 Genus Dentiradicibacter Bartsch et al. 2025, incertae sedis
                   03 Genus "Ferribacter" Nakagawa et al. 2002 nom. inval., incertae sedis
                   04 Genus "Imtechium" Macedo et al. 2007 nom. inval., incertae sedis
                   05 Genus "Candidatus Branchiomonas" Toenshoff et al. 2020, incertae sedis
                   06 Genus "Candidatus Dactylopiibacterium" Ramírez-Puebla et al. 2020, incertae sedis
                   07 Genus "Candidatus Glomeribacter" Bianciotto et al. 2003, incertae sedis [monotypic]
                   08 Genus "Candidatus Ichthyocystis" Seth-Smith et al. 2022, incertae sedis
                   09 Genus "Candidatus Kinetoplastidibacterium" corrig. Du et al. 2020, incertae sedis
                   10 Genus "Candidatus Nasuia" Noda et al. 2020, incertae sedis
                   11 Genus "Candidatus Nitrotoga" Alawi et al. 2020, incertae sedis
                   12 Genus "Candidatus Profftella" Nakabachi et al. 2020, incertae sedis
                   13 Genus "Candidatus Spencerbrownia" corrig. Gruwell et al. 2020, incertae sedis
                   14 Genus "Candidatus Symbiobacter" Liu et al. 2020, incertae sedis
                   15 Genus "Candidatus Tremblayella" corrig. Thao et al. 2020, incertae sedis
                   16 Genus "Candidatus Vallotiella" corrig. Toenshoff et al. 2020, incertae sedis
                   17 Genus "Candidatus Vidania" Gonella et al. 2020, incertae sedis
                   18 Family Casimicrobiaceae Song et al. 2020, incertae sedis [monotypic]
                   19 Order Burkholderialesᵀ Garrity et al. 2006
                   20 Order Neisseriales Tønjum 2006
                   21 Order Rhodocyclales Garrity et al. 2006
                   22 Order Spirillales Prévot 1940 (Approved Lists 1980)
                   23 Order "Ferritrophicales" Weiss et al. 2007 nom. inval. [monotypic]
                   24 Order "Candidatus Procaibacterales" corrig. Garrity et al. 2002 nom. nud. [monotypic]