[organisms] see Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
   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
             1 Genus Parachlamydia Everett et al. 1999
             2 Genus Neochlamydia Horn et al. 2001 nom. inval.