Bacteroides bifidus Dataset NCBI Taxonomy Classification phylum Actinomycetota class Actinomycetes order Bifidobacteriales family Bifidobacteriaceae genus Bifidobacterium species Bifidobacterium bifidum Name Homonyms "Bacteroides bifidus" (Tissier 1900) Castellani and Chalmers 1919 Bacteroides bifidus