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 Micrococcineae Stackebrandt et al. 1997 see Order Micrococcales Prévot 1940 (Approved Lists 1980)
               Family Intrasporangiaceae Rainey et al. 1997
                 1 Genus Intrasporangium Kalakoutskii et al. 1967 (Approved Lists 1980)
                 2 Genus Janibacter Martin et al. 1997
                 3 Genus Ornithinicoccus Groth et al. 1999
                 4 Genus Ornithinimicrobium Groth et al. 2001
                 5 Genus Nostocoidia
                 6 Genus Terrabacter Collins et al. 1989
                 7 Genus Terracoccus Prauser et al. 1997
                 8 Genus Tetrasphaera Maszenan et al. 2000