Methanococcus vannielii Dataset NCBI Taxonomy Rank SPECIES Classification kingdom Methanobacteriati phylum Methanobacteriota class Methanococci order Methanococcales family Methanococcaceae genus Methanococcus species Methanococcus vannielii Name Synonyms Methanococcus vannielii Stadtman and Barker 1951 Homonyms Methanococcus vannielii Methanococcus vannielii Stadtman and Barker 1951