Methanobacterium ruminantium Dataset NCBI Taxonomy Classification phylum Euryarchaeota class Methanobacteria order Methanobacteriales family Methanobacteriaceae genus Methanobrevibacter species Methanobrevibacter ruminantium Name Homonyms Methanobacterium ruminantium Methanobacterium ruminantium Smith and Hungate 1958 (Approved Lists 1980)