organisms see Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
   Kingdom Monera Haeckel 1866 see Domain Bacteria Woese et al. 1990
     Phylum Omnibacteria Margulis and Schwartz 1982 see Domain Bacteria Woese et al. 1990
       Class "Rickettsias and Chlamydias"
         Genus Chlamydia Jones et al. 1945 (Approved Lists 1980)
           Chlamydia psittaci (Lillie 1930) Page 1968 (Approved Lists 1980) see Chlamydophila psittaci (Lillie 1930) Everett et al. 1999