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 Spirillales Prévot 1940 (Approved Lists 1980)
                     Family Sterolibacteriaceae Boden et al. 2017
                       1 Genus Denitratisoma Fahrbach et al. 2006 [monotypic]
                       2 Genus Georgfuchsia Weelink et al. 2011 [monotypic]
                       3 Genus Methyloversatilis Kalyuzhnaya et al. 2006
                       4 Genus Sterolibacteriumᵀ Tarlera and Denner 2003 [monotypic]
                       5 Genus Sulfurisoma Kojima and Fukui 2014
                       6 Genus Sulfuritalea Kojima and Fukui 2011
                       7 Genus "Sulfuricystis" Kojima et al. 2022 nom. inval.