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 Thermotogati Battistuzzi and Hedges 2024
               Phylum Thermotogotaᵀ Reysenbach 2021 [monotypic]
                 Class Thermotogaeᵀ Reysenbach 2002
                   Order Thermotogalesᵀ Reysenbach 2002
                     Family Fervidobacteriaceae Bhandari and Gupta 2014
                       Genus Thermosipho Huber et al. 1989
                         Thermosipho atlanticus Urios et al. 2004