methanolacinia methanolacinia in taxonomy, methanolacinia is a genus of the methanomicrobiaceae. the cells are bar-shaped and irregular 0.6 μm in diameter and 1.5–2.5 μm in length. they do not form endospores. most are non-motile, but some have a single flagellum. they are strictly anaerobic. they produce methane through the reduction of carbon dioxide with hydrogen and cannot use formate, acetate or methyl compounds as substrates. methanolacinia scientific classification domain: archaea kingdom: euryarchaeota phylum: euryarchaeota class: methanomicrobia order: methanomicrobiales family: methanomicrobiaceae genus: methanolaciniazellner et al. 1990 type species methanolacinia paynteri(rivard et al. 1984) zellner et al. 1990 species m. paynteri m. petrolearia