Procaryotic Genera
   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
       1 Class Methanobacteria Boone 2001 nom. inval. [monotypic] see Class Methanobacteria Boone 2002
       2 Class Methanococci Boone 2001 nom. inval. see Class Methanococci Boone 2002
       3 Class Halobacteria Grant et al. 2001 nom. inval. [monotypic] see Class Halobacteria Grant et al. 2002
       4 Class Thermoplasmata Reysenbach 2001 nom. inval. [monotypic] see Class Thermoplasmata Reysenbach 2002
       5 Class Thermococci Zillig and Reysenbach 2001 nom. inval. [monotypic] see Class Thermococci Zillig and Reysenbach 2002
       6 Class Archaeoglobi Garrity and Holt 2001 nom. inval. [monotypic] see Class Archaeoglobi Garrity and Holt 2002
       7 Class Methanopyri Garrity and Holt 2001 nom. inval. [monotypic] see Class Methanopyri Garrity and Holt 2002