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?]
             Superphylum "Proteobacteria" Craig et al. 2010
               Phylum "Alphaproteobacteria" Garrity et al., 2006 [monotypic]
                 Class Alphaproteobacteriaᵀ Garrity et al. 2006
                   Order Caulobacterales Henrici and Johnson 1935 (Approved Lists 1980)
                     Family Caulobacteraceaeᵀ Henrici and Johnson 1935 (Approved Lists 1980)
                       Genus Asticcacaulis Poindexter 1964 (Approved Lists 1980)
                         1 Asticcacaulis benevestitus Vasilyeva et al. 2006
                         2 Asticcacaulis biprosthecium (sic) Pate et al. 1973 (Approved Lists 1980)
                         3 Asticcacaulis excentricusᵀ Poindexter 1964 (Approved Lists 1980)
                         4 Asticcacaulis taihuensis Liu et al. 2005