prokaryotes - bacteria see Domain Bacteria Woese et al. 1990 Domain "Bacteria" Woese et al. 1990 Phylum "Actinobacteria" Garrity and Holt 2001 Class Actinobacteria Stackebrandt et al. 1997 Order Bifidobacteriales Stackebrandt et al. 1997 [monotypic] Family Bifidobacteriaceae Stackebrandt et al. 1997 01 Genus Aeriscardovia Simpson et al. 2004 02 Genus Alloscardovia Huys et al. 2007 03 Genus Bifidobacterium Orla-Jensen 1924 (Approved Lists 1980) 04 Genus Bombiscardovia Killer et al. 2014 05 Genus Gardnerella Greenwood and Pickett 1980 06 Genus Metascardovia Okamoto et al. 2007 07 Genus Neoscardovia García-Aljaro et al. 2015 08 Genus Parascardovia Jian and Dong 2002 09 Genus Pseudoscardovia Killer et al. 2014 10 Genus Scardovia Jian and Dong 2002