Methanogenium frittonii Harris et al. 1996 Dataset NCBI Taxonomy Classification phylum Euryarchaeota class Methanomicrobia order Methanomicrobiales family Methanomicrobiaceae genus Methanoculleus species Methanoculleus thermophilus Name Homonyms Methanogenium frittonii Methanogenium frittonii Harris et al. 1996