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 Actinomycetales Buchanan 1917 (Approved Lists 1980)
           Suborder Frankineae Stackebrandt et al. 1997 see Order Frankiales Sen et al. 2014
             1 Family Frankiaceae Becking 1970 (Approved Lists 1980)
             2 Family Geodermatophilaceae Normand et al. 1996 nom. nud. see Family Geodermatophilaceae Normand 2006
             3 Family Microsphaeraceae Rainey et al. 1997 nom. illeg. see Family Nakamurellaceae Tao et al. 2004
             4 Family Sporichthyaceae Rainey et al. 1997
             5 Family Acidothermaceae Rainey et al. 1997
             6 Family "Kineosporiaceae" Zhi et al., 2009 see Family Kineosporiaceae Zhi et al. 2009