Methanocaldococcus jannaschii Dataset NCBI Taxonomy Rank SPECIES Classification phylum Euryarchaeota class Methanococci order Methanococcales family Methanocaldococcaceae genus Methanocaldococcus species Methanocaldococcus jannaschii Name Synonyms Methanocaldococcus jannaschii (Jones et al. 1984) Whitman 2002 Methanococcus jannaschii Methanococcus jannaschii Jones et al. 1984 Homonyms Methanocaldococcus jannaschii Methanocaldococcus jannaschii (Jones et al. 1984) Whitman 2002