methanosphaera stadtmaniae methanosphaera stadtmaniae methanosphaera stadtmaniae is a methanogen archaeon. it is a non-motile, gram-positive, spherical-shaped organism that obtains energy by using hydrogen to reduce methanol to methane. it does not possess cytochromes and is part of the large intestine's biota. methanosphaera stadtmaniae scientific classification domain: archaea kingdom: euryarchaeota class: methanobacteria order: methanobacteriales family: methanobacteriaceae genus: methanosphaera species: m. stadtmaniae binomial name methanosphaera stadtmaniaemiller & wollin, 1985 this species is often referred to as methanosphaera stadtmanae, apparently erroneously.