prokaryotes - bacteria see Domain Bacteria Woese et al. 1990 stat. inval.
   Domain "Archaea" Woese et al. 1990 stat. inval. see Domain Archaea Woese et al. 2024
     Phylum "Euryarchaeota" Garrity and Holt 2002 stat. inval. see Kingdom Methanobacteriati (Garrity and Holt 2023) Oren and Göker 2024
       Class Thermoplasmata Reysenbach 2002 [monotypic]
         Order Thermoplasmatales Reysenbach 2002
           Genus Thermogymnomonas Itoh et al. 2007, incertae sedis