Procaryotic Genera
   Domain "Bacteria" Woese et al. 1990
     Phylum Actinobacteria Garrity and Holt 2001 [monotypic]
       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 Propionibacterineae Rainey et al. 1997
               Family Nocardioidaceae Nesterenko et al. 1990
                 1 Genus Nocardioides Prauser 1976 (Approved Lists 1980)
                 2 Genus Aeromicrobium Miller et al. 1991
                 3 Genus Friedmanniella Schumann et al. 1997
                 4 Genus Hongia Lee et al. 2000 see Genus Kribbella Park et al. 1999
                 5 Genus Kribbella Park et al. 1999
                 6 Genus Micropruina Shintani et al. 2000
                 7 Genus Marmoricola Urzì et al. 2000