[organisms] see Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
   Domain Bacteria Woese et al. 1990
     Phylum "Actinobacteria" Garrity and Holt 2001
       Class "Actinobacteria" Stackebrandt et al. 1997
         Subclass Actinobacteridae Stackebrandt et al. 1997 see Class Actinobacteria Stackebrandt et al. 1997
           Order Bifidobacteriales Stackebrandt et al. 1997
             Family Bifidobacteriaceae Stackebrandt et al. 1997
               Genus Bifidobacterium Orla-Jensen 1924 (Approved Lists 1980)
                 Bifidobacterium catenulatum Scardovi and Crociani 1974 (Approved Lists 1980)