Palaeococcus helgesonii Dataset NCBI Taxonomy Rank SPECIES Classification kingdom Methanobacteriati phylum Methanobacteriota class Thermococci order Thermococcales family Thermococcaceae genus Palaeococcus species Palaeococcus helgesonii Name Synonyms Palaeococcus helgesonii Amend et al. 2006 Homonyms Palaeococcus helgesonii Palaeococcus helgesonii Amend et al. 2006