Methanobrevibacter woesei is a species of methanogen archaeon, named after Carl R. Woese.
Coccobacillus with slightly tapered ends, about 0.6 micrometres in width and 1 micrometre in length, occurring in pairs or short chains. Gram-positive reaction. Its cell walls are composed of pseudomurein. It is a strict anaerobe and its type strain is GS<sup>T</sup>(=DSM 11979<sup>T</sup> =OCM 815<sup>T</sup>). It was first isolated from goose faeces.