methanobacteriaceae methanobacteriaceae in taxonomy, the methanobacteriaceae are a family of the methanobacteriales. methanobacteriaceae scientific classification domain: archaea kingdom: euryarchaeota class: methanobacteria order: methanobacteriales family: methanobacteriaceaebarker 1956 genera methanobacterium methanobrevibacter methanosphaera methanothermobacter phylogeny the currently accepted taxonomy is based on the list of prokaryotic names with standing in nomenclature (lpsn) and national center for biotechnology information (ncbi). 16s rrna-based ltp_01_2022 53 marker proteins based gtdb 07-rs207 methanothermobacter species-group 2 methanothermobacter methanobacterium species-group 2 methanobacterium methanosphaera methanobrevibacter methanothermobacter species-group 2 "methanothermobacteraceae" methanothermobacter methanobacteriaceae methanobrevibacter methanobacterium species-group 2 methanosphaera methanobacterium