Chlamydiales

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.

Chlamydiales
Scientific classification
Domain: Bacteria
Phylum: Chlamydiota
Class: Chlamydiia
Order: Chlamydiales
Storz and Page 1971
Families
Synonyms
  • "Amoebachlamydiales" Dharamshi et al. 2021
  • "Anoxychlamydiales" Dharamshi et al. 2019
  • Parachlamydiales Gupta et al. 2016
  • "Simkaniales" Dharamshi et al. 2021

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
16S rRNA based LTP_01_2022[1][2][3] 120 marker proteins based GTDB 07-RS207[4][5][6]
 
 
 

Waddliaceae

 
 
 

Simkaniaceae

 
 

Parachlamydiaceae

 
 
 
 

Chlamydiaceae

 
 
 
 
 

"Rhabdochlamydiaceae"

 
 

Simkaniaceae

 
 
 
 
 

"Criblamydiaceae"

 
 
 

Waddliaceae

 
 

Parachlamydiaceae

 
 
 
 

Chlamydiaceae (incl. "Clavichlamydiaceae")

 
 
 

Taxonomy

The currently accepted taxonomy is based on the List of Prokaryotic names with Standing in Nomenclature (LPSN)[7] and National Center for Biotechnology Information (NCBI)[8]

  • Family "Actinochlamydiaceae" Steigen et al. 2013
    •  ?"Ca. Actinochlamydia" Steigen et al. 2013
  • Family "Clavichlamydiaceae" Horn 2011
    • "Ca. Clavichlamydia" corrig. Karlsen et al. 2008
  • 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. 2021
    • Chlamydophila Everett, Bush & Andersen 1999
    •  ?"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. Renichlamydia" Corsaro & Work 2012
    • "Ca. Rhabdochlamydia" Kostanjsek et al. 2004
  • Family Simkaniaceae Everett, Bush & Andersen 1999
    •  ?"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

References
  1. "The LTP". Retrieved 23 February 2022.
  2. "LTP_all tree in newick format". Retrieved 23 February 2022.
  3. "LTP_01_2022 Release Notes" (PDF). Retrieved 23 February 2022.
  4. "GTDB release 07-RS207". Genome Taxonomy Database. Retrieved 20 June 2022.
  5. "bac120_r207.sp_labels". Genome Taxonomy Database. Retrieved 20 June 2022.
  6. "Taxon History". Genome Taxonomy Database. Retrieved 20 June 2022.
  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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