Methanococcus vannielii Stadtman & Barker, 1951 Dataset TAXREF Rank SPECIES Classification kingdom Archaea phylum Euryarchaeota class Methanococci order Methanococcales family Methanococcaceae genus Methanococcus species Methanococcus vannielii Name Homonyms Methanococcus vannielii Stadtman & Barker, 1951