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) Family Parachlamydiaceae Everett et al. 1999 Genus Parachlamydia Everett et al. 1999