methanoregula methanoregula in the taxonomy of microorganisms, candidatus methanoregula is a genus of the methanomicrobiales. it was is isolated from an acidic peat bog. it produces methane at the lowest ph of any known organism. methanoregula scientific classification domain: archaea kingdom: euryarchaeota phylum: euryarchaeota class: methanomicrobia order: methanomicrobiales family: methanoregulaceae genus: methanoregulabrauer et al. 2011 type species methanoregula booneibrauer et al. 2011 species m. boonei m. formicica synonyms "ca. methanoregula" brauer et al. 2006