Name: Chlamydiaceae Rake 1957 (Approved Lists 1980)

Category: Family

Proposed as: fam. nov.

Etymology: Chla.my.di.a’ce.ae. N.L. fem. n. Chlamydia, type genus of the family; L. fem. pl. n. suff. -aceae, ending to denote a family; N.L. fem. pl. n. Chlamydiaceae, the Chlamydia family

Pronunciation, gender: k^hla-my-di-A-ke-a͡e, feminine

Type genus: Chlamydia Jones et al. 1945 (Approved Lists 1980)

Effective publication: Rake G. Family II. Chlamydiaceae Rake, Fam. Nov. In Breed, R. S., E. G. D. Murray & N. R. Smith (4s). Bergey’s Manual of Determinative Bacteriology, 7th ed. The Williams and Wilkins Co., Baltimore, 1957.

IJSEM list: Skerman VBD, McGowan V, Sneath PHA. Approved lists of bacterial names. Int J Syst Bacteriol 1980; 30:225-420.

Nomenclatural status: validly published under the ICNP

Taxonomic status: correct name

• Synonyms:

  • Name	Kind
    "Candidatus Clavichlamydiaceae" Horn 2010	heterotypic synonym, pro-validly published under the ICNP

• Emendations:
  • Everett et al. 1999 Everett KD, Bush RM, Andersen AA. Emended description of the order Chlamydiales, proposal of Parachlamydiaceae fam. nov. and Simkaniaceae fam. nov., each containing one monotypic genus, revised taxonomy of the family Chlamydiaceae, including a new genus and five new species, and standards for the identification of organisms. Int J Syst Bacteriol 1999; 49:415-440. Anonymous. Notification list. Notification that new names and new combinations have appeared in volume 49, part 2 of the IJSB. Int J Syst Bacteriol 1999; 49:937-939.
    Notes:
    • ⊕ Emendation accompanied by the inclusion of 1 genus in the family.
    • 🧍 In a "Letter to the Editor", several bacteriologists [1] strongly object to the reclassification of the family Chlamydiaceae proposed by Everett et al. 1999. — 🧍 See also, the reply by Everett and Andersen [2].
  • Sachse et al. 2015 Sachse K, Bavoil PM, Kaltenboeck B, Stephens RS, Kuo CC, Rossello-Mora R, Horn M. Emendation of the family Chlamydiaceae: proposal of a single genus, Chlamydia, to include all currently recognized species. Syst Appl Microbiol 2015; 38:99-103. Oren A, Garrity GM. List of changes in taxonomic opinion no. 22. Notification of changes in taxonomic opinion previously published outside the IJSEM. Int J Syst Evol Microbiol 2015; 65:2028-2029.

• Notes:
  • 🧕 Breed et al. (1957) assigned this family to the order Rickettsiales Gieszczykiewicz 1939 (Approved Lists 1980). Publication: Parker CD. Genus V. Thiobacillus Beijerinck 1904. In: Breed RS, Murray EGD, Smith NR (eds), Bergey's Manual of Determinative Bacteriology, 7th edition, The Williams & Wilkins Co, Baltimore, 1957, p. 83-88.
  • 🧕 Philip (1962) assigned this family to the order Rickettsiales Gieszczykiewicz 1939 (Approved Lists 1980). Publication: Philip CB. Appendix G. Summary of tickborne rickettsioses. Report 2nd Meeting FAOIE Expert Panel on Tick-borne Diseases of Livestock, Cairo. United Nations, Rome, 1962.
  • 🙄 This taxon name is occasionally misprinted (or affected by an OCR error) in some sources as: "Chamydiaceae"; "Chfumydiaceae"; "Chiamydiaceae"; "Chlamydiacaceae"; "Thlamydiaceae".
  • 🧔 This taxon was discussed in a meeting of a Taxonomic Subcommittee of the ICSP. Publication: Greub G. International Committee on Systematics of Prokaryotes. Subcommittee on the taxonomy of the Chlamydiae: minutes of the closed meeting, 21 June 2010, Hof bei Salzburg, Austria. Int J Syst Evol Microbiol 2010; 60:2694.
  • 🧔 This taxon was discussed in a meeting of a Taxonomic Subcommittee of the ICSP. Publication: Borel N, Horn M, Greub G. International Committee on Systematics of Prokaryotes (ICSP) Subcommittee on the taxonomy of Chlamydiae. Minutes of the closed meeting, 20 March 2019, Seattle, WA, USA. Int J Syst Evol Microbiol 2019; 69:3654-3656.
  • 🧔 This taxon was discussed in a meeting of a Taxonomic Subcommittee of the ICSP. Publication: Borel N, Greub G. International Committee on Systematics of Prokaryotes Subcommittee on the taxonomy of Chlamydiae, minutes of the closed meeting, 07 October 2021, via Webex. Int J Syst Evol Microbiol 2022; 72:5213.
  • 🧔 This taxon was discussed in a meeting of a Taxonomic Subcommittee of the ICSP. Publication: Borel N, Greub G. International Committee on Systematics of Prokaryotes (ICSP) Subcommittee on the taxonomy of Chlamydiae, minutes of the closed meeting, 10 September 2020, via Zoom. Int J Syst Evol Microbiol 2021; 71:4620.
  • 🎰 The BRCs most frequently used for deposits in this group are: DSM: 22; ATCC: 17; CSUR: 9; B: 2.
  • 🧍 See also Caspe and Hill (2024). Publication: Caspe SG, Hill H. Chlamydiosis in Animals. Animals (Basel) 2024; 14:0.

Subdivision:

Number of child taxa with a validly published and correct name: 2
Number of child taxa with a validly published name, including synonyms: 3
Total number of child taxa: 13

• Child taxa:

  • Name	Nomenclatural status	Taxonomic status
    "Candidatus Amphibiichlamydia" Martel et al. 2012	not validly published	pro-correct name
    "Bedsonia" Meyer 1953	not validly published	preferred name
    Chlamydia Jones et al. 1945 (Approved Lists 1980)	validly published under the ICNP	correct name
    Chlamydiifrater Vorimore et al. 2023	validly published under the ICNP	correct name
    Chlamydophila Everett et al. 1999	validly published under the ICNP	synonym
    [Chlamydozoon]	preliminary entry that lacks crucial information
    "Candidatus Clavichlamydia" corrig. Karlsen et al. 2008	not validly published	pro-correct name
    "Candidatus Clavochlamydia" Karlsen et al. 2008	inaccurate spelling	misspelling
    "Colesiota" Rake 1948	not validly published	preferred name
    "Colettsia" Breed et al. 1957	not validly published	preferred name
    "Candidatus Medusoplasma" Viver et al. 2017	not validly published	pro-correct name
    [Miyagawanella]	preliminary entry that lacks crucial information
    "Ricolesia" Rake 1957	not validly published	preferred name

Parent taxon: Chlamydiales Storz and Page 1971 (Approved Lists 1980)

Assigned by: Everett KD, Bush RM, Andersen AA. Emended description of the order Chlamydiales, proposal of Parachlamydiaceae fam. nov. and Simkaniaceae fam. nov., each containing one monotypic genus, revised taxonomy of the family Chlamydiaceae, including a new genus and five new species, and standards for the identification of organisms. Int J Syst Bacteriol 1999; 49:415-440.

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Record number: 306