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 Rhodobacteraceaeᵀ Garrity et al. 2006 nom. illeg.] see Family Paracoccaceae Liang et al. 2022
                       [Genus Pelagibaca Cho and Giovannoni 2006 [monotypic]] see Genus Salipiger Martínez-Cánovas et al. 2004
                         1 Pelagibaca bermudensisᵀ Cho and Giovannoni 2006