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 Cystobacterineae Reichenbach 2007
                     Family Cystobacteraceaeᵀ McCurdy 1970 (Approved Lists 1980)
                       Genus Melittangium Jahn 1924 (Approved Lists 1980)
                         1 Melittangium alboraceum (Peterson 1959) McCurdy 1971 (Approved Lists 1980)
                         2 Melittangium boletusᵀ Jahn 1924 (Approved Lists 1980)
                         3 Melittangium lichenicola (Thaxter 1892) McCurdy 1971 (Approved Lists 1980)