Ruminococcus callidus Dataset NCBI Taxonomy Rank SPECIES Classification phylum Bacillota class Clostridia order Eubacteriales family Oscillospiraceae genus Ruminococcus species Ruminococcus callidus Name Synonyms Ruminococcus callidus Holdeman and Moore 1974 (Approved Lists 1980) Homonyms Ruminococcus callidus Ruminococcus callidus Holdeman and Moore 1974 (Approved Lists 1980)