(Methanobacteria) (Methanobacteria) is a biological class of the kingdom Archaea and phylum Euryarchaeota.
Methanobacteriales
Archaeoglobi
Halobacteria
Methanobacteria
Methanococci
Methanomicrobia
Methanopyri
Nanohaloarchaea
Thermococci
Thermoplasmata