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?]
             Phylum "Deltaproteobacteria" Kuever et al., 2006 [polyphyletic]
               Class Deltaproteobacteriaᵀ Kuever et al. 2006
                 Order Myxococcales Tchan et al. 1948 (Approved Lists 1980)
                   Suborder Sorangiineae corrig. Reichenbach 2007
                     Family Polyangiaceaeᵀ Jahn 1924 (Approved Lists 1980)
                       Genus "Haploangium"
                         1 "Haploangium minus"
                         2 "Haploangium rugiseptum" Peterson 1959