"Candidatus Methanohalarchaeum" Sorokin et al. 2018 Dataset NCBI Taxonomy Classification phylum Euryarchaeota class Methanonatronarchaeia order Methanonatronarchaeales family Methanonatronarchaeaceae genus Candidatus Methanohalarchaeum Name Homonyms Candidatus Methanohalarchaeum "Candidatus Methanohalarchaeum" Sorokin et al. 2018