[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 Chlamydiaceae Rake 1957 (Approved Lists 1980)
             Genus Chlamydophila Everett et al. 1999
               1 Chlamydophila psittaci (Lillie 1930) Everett et al. 1999
               2 Chlamydophila abortus Everett et al. 1999
               3 Chlamydophila caviae Everett et al. 1999
               4 Chlamydophila felis Everett et al. 1999
               5 Chlamydophila pecorum (Fukushi and Hirai 1992) Everett et al. 1999
               6 Chlamydophila pneumoniae (Grayston et al. 1989) Everett et al. 1999