Methanobrevibacter gottschalkii is a species of methanogen archaeon, named after Gerhard Gottschalk.
It is a coccobacillus with rounded ends, about 0.7 micrometres in width and 0.9 micrometres in length, occurring in pairs or short chains. Gram-positive reaction. Its cell wall is composed of pseudomurein. It is a strict anaerobe and its type strain is HO<sup>T</sup> (=DSM 11977<sup>T</sup> =OCM 813<sup>T</sup>). It was first isolated from horse and pig faeces.