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 Thermotogaceaeᵀ Reysenbach 2002
                       Genus Thermotogaᵀ Stetter and Huber 1986
                         1 Thermotoga elfii Ravot et al. 1995
                         2 Thermotoga hypogea Fardeau et al. 1997
                         3 Thermotoga lettingae Balk et al. 2002
                         4 Thermotoga maritimaᵀ Stetter and Huber 1986
                         5 Thermotoga naphthophila Takahata et al. 2001
                         6 Thermotoga neapolitana Jannasch et al. 1989
                         7 Thermotoga petrophila Takahata et al. 2001
                         8 Thermotoga subterranea Jeanthon et al. 2000
                         9 Thermotoga thermarum Windberger et al. 1992