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 Rickettsiales Gieszczykiewicz 1939 (Approved Lists 1980)
                     Family Anaplasmataceae Philip 1957 (Approved Lists 1980)
                       Genus Ehrlichia Moshkovski 1945 (Approved Lists 1980)
                         [Ehrlichia equi Lewis et al. 1988] see Anaplasma phagocytophilum corrig. (Foggie 1949) Dumler et al. 2001