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 Sphaerisporangium corrig. Ara and Kudo 2007
                           1 Sphaerisporangium cinnabarinum corrig. Ara and Kudo 2007
                           2 Sphaerisporangium melleumᵀ corrig. Ara and Kudo 2007
                           3 Sphaerisporangium rubeum corrig. Ara and Kudo 2007
                           4 Sphaerisporangium viridialbum corrig. (Nonomura and Ohara 1960) Ara and Kudo 2007