Methanocaldococcus vulcanius Dataset NCBI Taxonomy Rank SPECIES Classification phylum Euryarchaeota class Methanococci order Methanococcales family Methanocaldococcaceae genus Methanocaldococcus species Methanocaldococcus vulcanius Name Synonyms Methanocaldococcus vulcanius (Jeanthon et al. 1999) Whitman 2002 Methanococcus vulcanius Methanococcus vulcanius Jeanthon et al. 1999 Homonyms Methanocaldococcus vulcanius Methanocaldococcus vulcanius (Jeanthon et al. 1999) Whitman 2002