Methanobrevibacter thaueriMethanobrevibacter thaueri is a species of methanogen archaeon, named after Rolf K. Thauer.DescriptionCoccobacillus with slightly tapered ends, about 0.5 micrometres in width and 0.6-1.2 micrometres 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 CWT. It was first isolated from cow faeces.