prokaryotes - bacteria see Domain Bacteria Woese et al. 1990
   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 2007
             Family Cystobacteraceae McCurdy 1970 (Approved Lists 1980)
               Genus Hyalangium Reichenbach 2007