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 Rhodospirillales Pfennig and Trüper 1971 (Approved Lists 1980)
                     Family Thalassobaculaceae Hördt et al. 2020
                       Genus Oceanibaculum Lai et al. 2009
                         1 Oceanibaculum indicumᵀ Lai et al. 2009
                         2 Oceanibaculum pacificum Dong et al. 2010