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 Sphingomonadales Yabuuchi and Kosako 2006
                     Family Sphingomonadaceaeᵀ Kosako et al. 2000
                       Genus Sphingopyxis Takeuchi et al. 2001
                         Sphingopyxis baekryungensis Yoon et al. 2005