methanomicrobia methanomicrobia in the taxonomy of microorganisms, the methanomicrobia are a class of the euryarchaeota. methanomicrobia methanosarcina barkeri fusaro scientific classification domain: archaea kingdom: euryarchaeota (unranked): stenosarchaea class: methanomicrobiagarrity, bell & lilburn 2003 orders methanocellales "methanoflorentales" methanomicrobiales methanosarcinales methanotrichales synonyms "methanocellia" cavalier-smith 2020 "methanosarcinia" rinke et al. 2020 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 "methanomicrobia" methanosarcinales methanocellales methanomicrobiales "methanoliparia" "methanoliparales" "archaeoglobia" archaeoglobales "syntropharchaeales" "methanocellia" methanocellales "methanosarcinia" methanotrichales methanosarcinales_a methanosarcinales methanomicrobiales