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Chlamydiales
Scientific classification
Domain:	Bacteria
Phylum:	Chlamydiota
Class:	Chlamydiia
Order:	Chlamydiales Storz and Page 1971
Families
"Actinochlamydiaceae" Chlamydiaceae "Criblamydiaceae" Parachlamydiaceae "Rhabdochlamydiaceae" Simkaniaceae Waddliaceae
Synonyms
"Amoebachlamydiales" Dharamshi et al. 2021 "Anoxychlamydiales" Dharamshi et al. 2019 Parachlamydiales Gupta et al. 2016 "Simkaniales" Dharamshi et al. 2021

The bacterial order Chlamydiales includes only obligately intracellular bacteria that have a chlamydia-like developmental cycle of replication and at least 80% 16S rRNA or 23S rRNA gene sequence identity with other members of Chlamydiales. Chlamydiales live in animals, insects, and protozoa.

Currently, the order Chlamydiales includes the families Chlamydiaceae, Simkaniaceae, and Waddliaceae, which have Gram-negative extracellular infectious bodies (EBs), and Parachlamydiaceae, which has variable Gram staining of EBs. The family Rhabdochlamydiaceae has been proposed.

Phylogeny

Taxonomy

The currently accepted taxonomy is based on the List of Prokaryotic names with Standing in Nomenclature (LPSN) and National Center for Biotechnology Information (NCBI)

• Family "Actinochlamydiaceae" Steigen et al. 2013
  • ?"Ca. Actinochlamydia" Steigen et al. 2013
• Family "Criblamydiaceae" Thomas, Casson & Greub 2006
  • "Criblamydia" Thomas, Casson & Greub 2006
  • "Estrella" Thomas et al. 2006
• Family Chlamydiaceae Rake 1957
  • "Ca. Amphibiichlamydia" Martel et al. 2012
  • Chlamydia Jones et al. 1945
  • Chlamydiifrater Vorimore et al. 2023
  • Chlamydophila Everett, Bush & Andersen 1999
  • "Ca. Clavichlamydia" corrig. Karlsen et al. 2008
  • ?"Ca. Medusoplasma" Viver et al. 2017
• Family Parachlamydiaceae Everett, Bush & Andersen 1999
  • ?"Ca. Mesochlamydia" Corsaro et al. 2012
  • ?"Ca. Metachlamydia" Corsaro et al. 2010
  • Neochlamydia Horn et al. 2001
  • Parachlamydia Everett, Bush & Andersen 1999
  • "Ca. Protochlamydia" Collingro et al. 2005
  • "Ca. Rubidus" Pagnier et al. 2015
• Family Rhabdochlamydiaceae Corsaro et al. 2009
  • ?"Ca. Acheromyda" Davison & Hurst 2023
  • ?"Ca. Renichlamydia" Corsaro & Work 2012
  • "Ca. Rhabdochlamydia" Kostanjsek et al. 2004
  • ?"Ca. Sacchlamyda" Davison & Hurst 2023
• Family Simkaniaceae Everett, Bush & Andersen 1999
  • ?"Ca. Amphrikana" Davison & Hurst 2023
  • ?"Ca. Fritschea" Everett et al. 2005
  • "Ca. Neptunochlamydia" Pizzetti et al. 2016
  • Simkania Everett, Bush & Andersen 1999
  • ?"Ca. Syngnamydia" Fehr et al. 2013
• Family Waddliaceae Rurangirwa et al. 1999
  • Genus Waddlia Rurangirwa et al. 1999

See also

• List of bacterial orders
• List of bacteria genera

References

1. "The LTP". Retrieved 20 November 2023.
2. "LTP_all tree in newick format". Retrieved 20 November 2023.
3. "LTP_08_2023 Release Notes" (PDF). Retrieved 20 November 2023.
4. "GTDB release 08-RS214". Genome Taxonomy Database. Retrieved 10 May 2023.
5. "bac120_r214.sp_label". Genome Taxonomy Database. Retrieved 10 May 2023.
6. "Taxon History". Genome Taxonomy Database. Retrieved 10 May 2023.
7. J.P. Euzéby. "Chlamydiota". List of Prokaryotic names with Standing in Nomenclature (LPSN). Retrieved 2022-09-09.
8. Sayers; et al. "Chlamydiae". National Center for Biotechnology Information (NCBI) taxonomy database. Retrieved 2022-09-09.

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