Procaryotic Genera
   Domain "Bacteria" Woese et al. 1990
     Phylum Chlamydiae Garrity and Holt 2001 [monotypic] see Phylum Chlamydiae Garrity and Holt 2012
       Class "Chlamydiae" Cavalier-Smith, 2002 [monotypic] see Class Chlamydiae Cavalier-Smith 2002
         Order Chlamydiales Storz and Page 1971 (Approved Lists 1980)
           1 Family Chlamydiaceae Rake 1957 (Approved Lists 1980)
           2 Family Parachlamydiaceae Everett et al. 1999 [monotypic]
           3 Family Simkaniaceae Everett et al. 1999 [monotypic]
           4 Family Waddliaceae Rurangirwa et al. 1999 [monotypic]