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 Gammaproteobacteriaᵀ Garrity et al. 2005
                   Order Enterobacterales Adeolu et al. 2016
                     Family Morganellaceae Adeolu et al. 2016
                       Genus Proteus Hauser 1885 (Approved Lists 1980) nom. cons.
                         1 Proteus hauseri O'Hara et al. 2000
                         2 Proteus inconstans (Ornstein 1920) Shaw and Clarke 1955 (Approved Lists 1980)
                         3 Proteus mirabilis Hauser 1885 (Approved Lists 1980)
                         4 Proteus morganii (Winslow et al. 1919) Yale 1939 (Approved Lists 1980)
                         5 Proteus penneri Hickman et al. 1983
                         6 Proteus rettgeri (Hadley et al. 1918) Rustigian and Stuart 1943 (Approved Lists 1980)
                         7 Proteus vulgaris Hauser 1885 (Approved Lists 1980)