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 Gammaproteobacteriaᵀ Garrity et al. 2005
                   Order Chromatiales Imhoff 2005
                     Family Chromatiaceaeᵀ Bavendamm 1924 (Approved Lists 1980)
                       Genus Nitrosococcus Winogradsky 1892 nom. cons. (Approved Lists 1980)
                         Nitrosococcus oceani corrig. (Watson 1965) Watson 1971 (Approved Lists 1980)