procaryotes
   Domain Bacteria Woese et al. 1990 stat. inval. see Domain Bacteria Woese et al. 2024
     Phylum Thermotogae Reysenbach 2001 nom. inval. [monotypic] see Phylum Thermotogae Reysenbach 2002 stat. inval.
       Class Thermotogae Reysenbach 2001 nom. inval. [monotypic] see Class Thermotogae Reysenbach 2002
         Order Thermotogalesᵀ Reysenbach 2001 nom. inval. [monotypic] see Order Thermotogales Reysenbach 2002
           Family Thermotogaceae Reysenbach 2001 nom. inval. see Family Thermotogaceae Reysenbach 2002
             Genus Thermosipho Huber et al. 1989