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 Alphaproteobacteria Garrity et al. 2006
                   Order Hyphomicrobiales Douglas 1957 (Approved Lists 1980)
                     Family Methylobacteriaceae Garrity et al. 2006
                       1 Genus Enterovirga Chen et al. 2017
                       2 Genus Hohaiivirga Wang et al. 2025
                       3 Genus Methylobacteriumᵀ Patt et al. 1976 (Approved Lists 1980)
                       4 Genus Methylorubrum Green and Ardley 2018
                       5 Genus Microvirga Kanso and Patel 2003
                       6 Genus Psychroglaciecola Qu et al. 2014