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
           ?Genus Excellospora Agre and Guzeva 1975 (Approved Lists 1980) see Genus Actinomadura Lechevalier and Lechevalier 1968 (Approved Lists 1980)