"Halomethanococcus mahi" Paterek and Smith 1985 Dataset NCBI Taxonomy Classification phylum Euryarchaeota class Methanomicrobia order Methanosarcinales family Methanosarcinaceae genus Methanohalophilus species Methanohalophilus mahii Name Homonyms Halomethanococcus mahi "Halomethanococcus mahi" Paterek and Smith 1985