Methanogenium marisnigri Romesser et al. 1981 Dataset NCBI Taxonomy Classification phylum Euryarchaeota class Methanomicrobia order Methanomicrobiales family Methanomicrobiaceae genus Methanoculleus species Methanoculleus marisnigri Name Homonyms Methanogenium marisnigri Methanogenium marisnigri Romesser et al. 1981