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 Rhodobacterales Garrity et al. 2006
                     Family Roseobacteraceae Liang et al. 2021
                       Genus Ruegeria Uchino et al. 1999
                         1 Ruegeria atlantica (Rüger and Höfle 1992) Uchino et al. 1999
                         2 Ruegeria mobilis Muramatsu et al. 2007
                         3 Ruegeria pelagia Lee et al. 2007
                         4.1 Ruegeria lacuscaerulensis (Petursdottir and Kristjansson 1999) Yi et al. 2007
                         4.2 Ruegeria pomeroyi (González et al. 2003) Yi et al. 2007