[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 Gammaproteobacteria Garrity et al. 2005
         Order "Enterobacteriales" Garrity and Holt 2001 nom. nud.
           Family Enterobacteriaceae Rahn 1937 (Approved Lists 1980)
             Genus Proteus Hauser 1885 (Approved Lists 1980)
               1 Proteus vulgaris Hauser 1885 (Approved Lists 1980)
               2 Proteus hauseri O'Hara et al. 2000
               3 Proteus inconstans (Ornstein 1920) Shaw and Clarke 1955 (Approved Lists 1980)
               4 Proteus mirabilis Hauser 1885 (Approved Lists 1980)
               5 Proteus morganii (Winslow et al. 1919) Yale 1939 (Approved Lists 1980)
               6 Proteus myxofaciens Cosenza and Podgwaite 1966 (Approved Lists 1980) see Cosenzaea myxofaciens (Cosenza and Podgwaite 1966) Giammanco et al. 2011
               7 Proteus penneri Hickman et al. 1983
               8 Proteus rettgeri (Hadley et al. 1918) Rustigian and Stuart 1943 (Approved Lists 1980)