Protochlamydia Horn 2010 Protochlamydia Horn 2010 Protochlamydia amoebophila Horn 2010 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 Parachlamydiales Gupta et al. 2016 Parachlamydiaceae Everett et al. 1999 Protochlamydia Horn 2010 Parachlamydiaceae Everett et al. 1999 Neochlamydia Horn et al. 2001 Parachlamydia Everett et al. 1999 Mesochlamydia Corsaro et al. 2013 Metachlamydia Corsaro et al. 2010 Protochlamydia amoebophila Horn 2010 Protochlamydia naegleriiphila corrig. Casson et al. 2008 Protochlamydia naegleriophila (sic) Casson et al. 2008 Collingro A. Toenshoff E.R. Taylor M.W. Fritsche T.R. Wagner M. Horn M. ‘Candidatus Protochlamydia amoebophila’, an endosymbiont of Acanthamoeba spp. 2005 55 5 1863 1866 International Journal of Systematic and Evolutionary Microbiology Int J Syst Evol Microbiol 1466-5026 1466-5034 10.1099/ijs.0.63572-0 16166679 Casson N. Michel R. Müller K.-D. Aubert J.D. Greub G. Protochlamydia naegleriophila as Etiologic Agent of Pneumonia 2008 14 1 168 172 Emerging Infectious Diseases Emerg Infect Dis 1080-6040 1080-6059 Collingro A. Toenshoff E.R. Taylor M.W. Fritsche T.R. Wagner M. Horn M. ‘Candidatus Protochlamydia amoebophila’, an endosymbiont of Acanthamoeba spp. 2005 55 5 1863 1866 International Journal of Systematic and Evolutionary Microbiology Int J Syst Evol Microbiol 1466-5026 1466-5034 10.1099/ijs.0.63572-0 16166679 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. Genus III. Protochlamydia Horn, gen. nov. (previously known as "Candidatus Protochlamydia" Collingro et al. 2005) 2010 4 2 870 872 Bergey's Manual of Systematic Bacteriology Springer New York 0387950427 Horn M. Professor William B. Whitman Protochlamydia 2015 1 1 Bergey's Manual of Systematics of Archaea and Bacteria John Wiley & Sons Hoboken, New Jersey 10.1002/9781118960608.gbm00368