procaryotes
   Domain Bacteria Woese et al. 1990 stat. inval. see Domain Bacteria Woese et al. 2024
     Phylum Chlamydiae Garrity and Holt 2001 nom. inval. [monotypic] see Phylum Chlamydiae Garrity and Holt 2012 stat. inval.
       Class "Chlamydiae" "Cavalier-Smith 1998" nom. nud. [monotypic] see Class Chlamydiae Cavalier-Smith 2002 nom. rej.
         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]