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 Bacillatiᵀ (Gibbons and Murray 1978) Oren and Göker 2024
               Phylum Actinomycetota Goodfellow 2021
                 Class Thermoleophilia Suzuki and Whitman 2013
                   Order Gaiellales Albuquerque et al. 2012 [monotypic]
                     Family Gaiellaceaeᵀ Albuquerque et al. 2012 [monotypic]
                       Genus Gaiellaᵀ Albuquerque et al. 2012 [monotypic]
                         Gaiella occultaᵀ Albuquerque et al. 2012