Natura - nature
   actualia - actual entities
     Mundus Plinius - physical world
       naturalia - natural bodies
         [crown] Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
           Domain Bacteria Woese et al. 1990 [paraphyletic?]
             Superphylum Terrabacteria Battistuzzi et al. 2004
               Phylum "Actinobacteria" Garrity and Holt 2001
                 Class Actinobacteriaᵀ Stackebrandt et al. 1997
                   Order Actinomycetalesᵀ Buchanan 1917 (Approved Lists 1980)
                     Suborder Streptosporangineae Ward-Rainey et al. 1997
                       Family Streptosporangiaceaeᵀ Goodfellow et al. 1990
                         Genus Streptosporangiumᵀ Couch 1955 (Approved Lists 1980)
                           Streptosporangium amethystogenes Nonomura and Ohara 1960 (Approved Lists 1980)
                             Streptosporangium amethystogenes subsp. amethystogenesᵀ (Nonomura and Ohara 1960) Iinuma et al. 1996