living organisms see Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
   Superkingdom Prokaryotae see Superkingdom Prokarya
     Kingdom Monera Haeckel 1866 see Domain Bacteria Woese et al. 1990
       Division Bacteria (Haeckel 1894) see Domain Bacteria Woese et al. 1990
         "Rickettsias" see Order Rickettsiales Gieszczykiewicz 1939 (Approved Lists 1980)
           Order Rickettsiales Gieszczykiewicz 1939 (Approved Lists 1980)
             Family Rickettsiaceae Pinkerton 1936 (Approved Lists 1980)
               Tribe Rickettsieae Philip 1957 (Approved Lists 1980) see Family Rickettsiaceae Pinkerton 1936 (Approved Lists 1980)
                 Genus Rickettsia da Rocha-Lima 1916 (Approved Lists 1980)
                   1 Rickettsia prowazekii da Rocha-Lima 1916 (Approved Lists 1980)
                   2 Rickettsia typhi (Wolbach and Todd 1920) Philip 1943 (Approved Lists 1980)
                   3 Rickettsia rickettsii (Wolbach 1919) Brumpt 1922 (Approved Lists 1980)
                   4 Rickettsia sibirica Zdrodovskii 1948 (Approved Lists 1980)
                   5 Rickettsia conorii Brumpt 1932 (Approved Lists 1980)
                   6 Rickettsia australis Philip 1950 (Approved Lists 1980)
                   7 Rickettsia akari Huebner et al. 1946 (Approved Lists 1980)
                   8 Rickettsia tsutsugamushi (Hayashi 1920) Ogata 1931 (Approved Lists 1980) see Orientia tsutsugamushi (Hayashi 1920) Tamura et al. 1995