Methanogenium organophilum Widdel et al. 1989 Dataset NCBI Taxonomy Classification phylum Euryarchaeota class Methanomicrobia order Methanomicrobiales family Methanomicrobiaceae genus Methanogenium species Methanogenium organophilum Name Homonyms Methanogenium organophilum Methanogenium organophilum Widdel et al. 1989