prokaryotes - bacteria see Domain Bacteria Woese et al. 1990 stat. inval.
   Domain "Bacteria" Woese et al. 1990 stat. inval. see Domain Bacteria Woese et al. 2024
     Phylum "Aquificae" Reysenbach 2002 stat. inval. [monotypic] see Phylum Aquificota Reysenbach 2021
       Class Aquificae Reysenbach 2002 [monotypic]
         Order Aquificales Reysenbach 2002
           Family Desulfurobacteriaceae L'Haridon et al. 2006
             1 Genus Balnearium Takai et al. 2003
             2 Genus Desulfurobacterium L'Haridon et al. 1998
             3 Genus Phorcysia Pérez-Rodríguez et al. 2012
             4 Genus Thermovibrio Huber et al. 2002