Halobacterium Detailed phylogenetic tree of the archaea based on 16s ribosomal RNA sequence Euryarchaeota Comparisons Archaeoglobus Halophilic Methanococcus Methanobacterium Crenarchaeota Sulfolobus Thermococcus Methanosarcina Methanothermus Pyrodictium Thermoproteus Thermoplasma Methanopyn Desulfurococcus KorarchaeotaDetailed phylogenetic tree of the Archaea based on 16S ribosomal RNA sequence Comparisons