Natura - nature
   actualia - actual entities
     Mundus Plinius - physical world
       naturalia - natural bodies
         [crown] Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
           Domain Bacteria Woese et al. 1990 [paraphyletic?]
             Superphylum Terrabacteria Battistuzzi et al. 2004
               Phylum "Actinobacteria" Garrity and Holt 2001
                 Class Actinobacteriaᵀ Stackebrandt et al. 1997
                   Order Bifidobacteriales Stackebrandt et al. 1997 [monotypic]
                     Family Bifidobacteriaceae Stackebrandt et al. 1997
                       01 Genus Bifidobacteriumᵀ Orla-Jensen 1924 (Approved Lists 1980)
                       02 Genus Aeriscardovia Simpson et al. 2004 [monotypic]
                       03 Genus Alloscardovia Huys et al. 2007
                       04 Genus Bombiscardovia Killer et al. 2014 [monotypic]
                       05 Genus Gardnerella Greenwood and Pickett 1980 [monotypic]
                       06 Genus Metascardovia Okamoto et al. 2007 [monotypic]
                       07 Genus Neoscardovia García-Aljaro et al. 2015
                       08 Genus Parascardovia Jian and Dong 2002 [monotypic]
                       09 Genus Pseudoscardovia Killer et al. 2014
                       10 Genus Scardovia Jian and Dong 2002 [monotypic]