Bifidobacterium longum Dataset NCBI Taxonomy Rank SPECIES Classification phylum Actinomycetota class Actinomycetes order Bifidobacteriales family Bifidobacteriaceae genus Bifidobacterium species Bifidobacterium longum Name Synonyms Bifidobacterium longum Reuter 1963 Bifidobacterium longum subsp. suis (Matteuzzi et al. 1971) Mattarelli et al. 2008 emend. Nouioui et al. 2018 Homonyms Bifidobacterium longum Bifidobacterium longum Reuter 1963