Domain Bacteria Woese et al. 1990 Phylum Chlamydiae Garrity and Holt 2001 see Phylum Chlamydiae Garrity and Holt 2012 Class "Chlamydiae" Cavalier-Smith, 2002 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 3 Family Simkaniaceae Everett et al. 1999 4 Family Waddliaceae Rurangirwa et al. 1999