Methanobrevibacter thaueri is a species of methanogen archaeon, named after Rolf K.

[1] Coccobacillus with slightly tapered ends, about 0.5 micrometres in width and 0.6-1.2 micrometres in length, occurring in pairs or short chains.

Its cell walls are composed of pseudomurein.

It is a strict anaerobe and its type strain is CWT (=DSM 11995T =OCM 817T).

It was first isolated from cow faeces.