[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 Alphaproteobacteria Garrity et al. 2006
         Order Rhizobiales Kuykendall 2006
           Family Beijerinckiaceae Garrity et al. 2006
             Genus Beijerinckia Derx 1950 (Approved Lists 1980)
               [Beijerinckia derxii] Tchan 1957 (Approved Lists 1980)
                 1 Beijerinckia derxii subsp. derxiiᵀ (Tchan 1957) Thompson and Skerman 1981
                 2 Beijerinckia derxii subsp. venezuelae corrig. Thompson and Skerman 1981