prokaryotes - bacteria see Domain Bacteria Woese et al. 1990
   Domain "Bacteria" Woese et al. 1990
     Phylum "Chlamydiae" Garrity and Holt 2012 [monotypic]
       Class Chlamydiae Cavalier-Smith 2002 [monotypic]
         Order Chlamydiales Storz and Page 1971 (Approved Lists 1980)
           Family Parachlamydiaceae Everett et al. 1999
             Genus Neochlamydia Horn et al. 2001 nom. inval., sedis mutabilis