Natura - nature
   actualia - actual entities
     Mundus Plinius - physical world
       naturalia - natural bodies
         Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
           Domain Bacteria Woese et al. 2024
             Kingdom Pseudomonadati (Gibbons and Murray 1978) Oren and Göker 2024
               Phylum Pseudomonadotaᵀ Garrity et al. 2021
                 Class Alphaproteobacteria Garrity et al. 2006
                   Order Rickettsiales Gieszczykiewicz 1939 (Approved Lists 1980)
                     Family Ehrlichiaceae Moshkovski 1945 (Approved Lists 1980)
                       Genus Ehrlichiaᵀ Moshkovski 1945 (Approved Lists 1980)
                         1 Ehrlichia canisᵀ (Donatien and Lestoquard 1935) Moshkovski 1945 (Approved Lists 1980)
                         2 Ehrlichia chaffeensis Anderson et al. 1992
                         3 Ehrlichia ewingii Anderson et al. 1992
                         4 Ehrlichia muris Wen et al. 1995
                         5 Ehrlichia ruminantium (Cowdry 1925) Dumler et al. 2001