Chlamydiia (Cavalier-Smith 2002) Horn 2016 emend. Gupta et al. 2015 Chlamydiia (Cavalier-Smith 2002) Horn 2016 emend. Gupta et al. 2015 Chlamydiales Storz and Page 1971 (Approved Lists 1980) emend. Gupta et al. 2015 Universal Root Woese et al. 1990 Bacteria (None 2015) Woese et al. 1990 Chlamydiota corrig. Garrity and Holt 2021 Chlamydiae (sic) Garrity and Holt 2021 non Chlamydiae Cavalier-Smith 2002 Chlamydiia (Cavalier-Smith 2002) Horn 2016 emend. Gupta et al. 2015 Chlamydiota corrig. Garrity and Holt 2021 Chlamydiae (sic) Garrity and Holt 2021 non Chlamydiae Cavalier-Smith 2002 Chlamydiae Cavalier-Smith 2002 non Chlamydiae Garrity and Holt 2021 Chlamydiales Storz and Page 1971 (Approved Lists 1980) emend. Gupta et al. 2015 Parachlamydiales Gupta et al. 2016 Gupta R.S. Naushad S. Chokshi C. Griffiths E. Adeolu M. A phylogenomic and molecular markers based analysis of the phylum Chlamydiae: proposal to divide the class Chlamydiia into two orders, Chlamydiales and Parachlamydiales ord. nov., and emended description of the class Chlamydiia 2015 108 3 765 781 Antonie van Leeuwenhoek 0003-6072 1572-9699 10.1007/s10482-015-0532-1 26179278 Chlamydiae Cavalier-Smith 2002 non Chlamydiae Garrity and Holt 2021 Oren A. Garrity G. Validation List No. 170. List of new names and new combinations previously effectively, but not validly, published 2016 66 7 2463 2466 International Journal of Systematic and Evolutionary Microbiology Int J Syst Evol Microbiol 1466-5026 1466-5034 10.1099/ijsem.0.001149 27530111 Gupta R.S. Naushad S. Chokshi C. Griffiths E. Adeolu M. A phylogenomic and molecular markers based analysis of the phylum Chlamydiae: proposal to divide the class Chlamydiia into two orders, Chlamydiales and Parachlamydiales ord. nov., and emended description of the class Chlamydiia 2015 108 3 765 781 Antonie van Leeuwenhoek 0003-6072 1572-9699 10.1007/s10482-015-0532-1 26179278 Horn M. Krieg N.R. Staley J.T. Brown D.R. Hedlund B.P. Paster B.J. Ward N.L. Ludwig W. Whitman W.B. Class I. Chlamydiia class. nov. 2010 4 2 844 844 Bergey's Manual of Systematic Bacteriology Springer New York 0387950427 Oren A. Garrity G. Notification of changes in taxonomic opinion previously published outside the IJSEM. List of Changes in Taxonomic Opinion no. 24 2016 66 7 2469 2470 International Journal of Systematic and Evolutionary Microbiology Int J Syst Evol Microbiol 1466-5026 1466-5034 10.1099/ijsem.0.001150 27530227