Order Legionellales

Name: Legionellales Garrity et al. 2005

Category: Order

Proposed as: ord. nov.

Etymology: Le.gi.o.nel.la’les. N.L. fem. dim. n. Legionella, type genus of the order; L. fem. pl. n. suff. -ales, ending to denote an order; N.L. fem. pl. n. Legionellales, the Legionella order

Pronunciation (Latin), gender: le-gi-o-nel-LA-les, feminine

Type genus: Legionella Brenner et al. 1979 (Approved Lists 1980)

Effective publication: Garrity GM, Bell JA, Lilburn T. Order VI. Legionellales ord. nov. In: Brenner DJ, Krieg NR, Staley JT, Garrity GM (eds), Bergey's Manual of Systematic Bacteriology, 2nd edn, vol. 2 (The Proteobacteria), part B (The Gammaproteobacteria), Springer, New York, 2005, p. 210. 🇺🇸

IJSEM list: Euzeby JP. Validation list no. 106. List of new names and new combinations previously effectively, but not validly, published. Int J Syst Evol Microbiol 2005; 55:2235-2238.

Nomenclatural status: validly published under the ICNP

Taxonomic status: correct name

Synonyms:

Name	Kind
Diplorickettsiales Chuvochina et al. 2024	heterotypic synonym, validly published under the ICNP
Coxiellales Chuvochina et al. 2024	heterotypic synonym, validly published under the ICNP
"Candidatus Berkiellales" Chuvochina et al. 2023	heterotypic synonym, not pro-validly published

Emendations:
- Saini and Gupta 2021 Saini N, Gupta RS. A robust phylogenetic framework for members of the order Legionellales and its main genera (Legionella, Aquicella, Coxiella and Rickettsiella) based on phylogenomic analyses and identification of molecular markers demarcating different clades. Antonie Van Leeuwenhoek 2021; 114:957-982. 🇨🇦 Oren A, Garrity GM. List of changes in taxonomic opinion no. 35. Notification of changes in taxonomic opinion previously published outside the IJSEM. Int J Syst Evol Microbiol 2022; 72:5164.
  Notes:
  - ⊕ Emendation accompanied by the inclusion of 2 families in the order.

Notes:
- 🧒 Brenner et al. (2005) assigned the genus Legionella Brenner et al. 1979 (Approved Lists 1980) to this order. Publication: Garrity GM, Bell JA, Lilburn T. Order VI. Legionellales ord. nov. In: Brenner DJ, Krieg NR, Staley JT, Garrity GM (eds), Bergey's Manual of Systematic Bacteriology, 2nd edn, vol. 2 (The Proteobacteria), part B (The Gammaproteobacteria), Springer, New York, 2005, p. 210. 🇺🇸
- 🧬 The phylogenomic assignment score of this taxon is -0.00137 (N = 1).
- 🎰 The BRCs most frequently used for deposits in this group are: DSM: 72; CCUG: 68; ATCC: 65; CIP: 52; NCTC: 47; JCM: 19; CSUR: 5; KCTC: 4; PCM: 2; IMVS: 2.

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: 5

Child taxa:

Name	Nomenclatural status	Taxonomic status
"Candidatus Berkiellaceae" Chuvochina et al. 2023	not validly published	synonym
Coxiellaceae Garrity et al. 2005	validly published under the ICNP	correct name
Diplorickettsiaceae Chuvochina et al. 2024	validly published under the ICNP	synonym
Legionellaceae Brenner et al. 1979 (Approved Lists 1980)	validly published under the ICNP	correct name
[Legionellales, not assigned to family]	artificial parent node of taxa incertae sedis

Parent taxon: Gammaproteobacteria Garrity et al. 2005

Assigned by: Garrity GM, Bell JA, Lilburn T. Order VI. Legionellales ord. nov. In: Brenner DJ, Krieg NR, Staley JT, Garrity GM (eds), Bergey's Manual of Systematic Bacteriology, 2nd edn, vol. 2 (The Proteobacteria), part B (The Gammaproteobacteria), Springer, New York, 2005, p. 210. 🇺🇸

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Record number: 5072

This LPSN page was printed on 2026-08-14 13:39:32

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Order Legionellales