Methanococcus vulcanius Jeanthon et al. 1999 Dataset NCBI Taxonomy Classification phylum Euryarchaeota class Methanococci order Methanococcales family Methanocaldococcaceae genus Methanocaldococcus species Methanocaldococcus vulcanius Name Homonyms Methanococcus vulcanius Methanococcus vulcanius Jeanthon et al. 1999