[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
         1 Order Desulfurellales Kuever et al. 2006
         2 Order Desulfovibrionales Kuever et al. 2006
         3 Order Desulfobacterales Kuever et al. 2006
         4 Order Desulfarculales corrig. Kuever et al. 2006
         5 Order Desulfuromonadales corrig. Kuever et al. 2006
         6 Order Syntrophobacterales Kuever et al. 2006
         7 Order Bdellovibrionales Garrity et al. 2006
         8 Order Myxococcales Tchan et al. 1948 (Approved Lists 1980)