[organisms] see Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
   Domain Bacteria Woese et al. 1990
     Phylum "Proteobacteria" Garrity et al. 2005 see Superphylum Proteobacteria Craig et al. 2010
       Class Deltaproteobacteria Kuever et al. 2006
         Order Myxococcales Tchan et al. 1948 (Approved Lists 1980)
           Suborder "Cystobacterineae" Reichenbach 2005 nom. inval. see Suborder Cystobacterineae Reichenbach 2007
             Family Cystobacteraceae McCurdy 1970 (Approved Lists 1980)
               Genus Melittangium Jahn 1924 (Approved Lists 1980)
                 1 Melittangium boletus Jahn 1924 (Approved Lists 1980)
                 2 Melittangium alboraceum (Peterson 1959) McCurdy 1971 (Approved Lists 1980)
                 3 Melittangium lichenicola (Thaxter 1892) McCurdy 1971 (Approved Lists 1980)