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 Methylophilaceae Garrity et al. 2006
                       1 Genus Methylobacillus Yordy and Weaver 1977 (Approved Lists 1980)
                       2 Genus Methylophilusᵀ Jenkins et al. 1987
                       3 Genus Methyloradius Miyadera et al. 2022
                       4 Genus Methylotenera Kalyuzhnaya et al. 2006
                       5 Genus Methylovorus Govorukhina and Trotsenko 1991
                       6 Genus Novimethylophilus Lv et al. 2018
                       7 Genus Pseudomethylobacillus Sheu et al. 2019
                       8 Genus "Candidatus Methylopumilus" Salcher et al. 2020