Name: Halobacteriales Grant and Larsen 1989

Category: Order

Proposed as: ord. nov.

Etymology: N.L. neut. n. Halobacterium, type genus of the order; L. fem. pl. n. suff. -ales, ending to denote an order; N.L. fem. pl. n. Halobacteriales, the Halobacterium order

Gender: feminine

Type genus: Halobacterium Elazari-Volcani 1957 (Approved Lists 1980)

Effective publication: Grant WD, Larsen H. Group 111. Extremely halophilic archaeobacteria. Order Halobacteriales ord. nov. In: Staley JT, Bryant MP, Pfennig N, Holt JG (eds), Bergey's manual of systematic bacteriology, vol. 3., The Williams & Wilkins Co., Baltimore, 1989, p. 2216-2218.

IJSEM list: Anonymous. Validation list no. 31. Validation of publication of new names and new combinations previously effectively published outside the IJSB. Int J Syst Bacteriol 1989; 39:495-497.

Nomenclatural status: validly published under the ICNP

Taxonomic status: correct name

• Synonyms:

  • Name	Kind
    Natrialbales Gupta et al. 2015	heterotypic synonym, validly published under the ICNP
    Haloferacales Gupta et al. 2015	heterotypic synonym, validly published under the ICNP

• Emendations:
  • Gupta et al. 2015 Gupta RS, Naushad S, Baker S. Phylogenomic analyses and molecular signatures for the class Halobacteria and its two major clades: a proposal for division of the class Halobacteria into an emended order Halobacteriales and two new orders, Haloferacales ord. nov. and Natrialbales ord. nov., containing the novel families Haloferacaceae fam. nov. and Natrialbaceae fam. nov. Int J Syst Evol Microbiol 2015; 65:1050-1069.
    Notes:
    • ⊕ Emendation accompanied by the inclusion of 1 family in the order.
    • 🧍 This emendation was not found in the expected IJSEM notification list.
  • Rinke et al. 2021 Rinke C, Chuvochina M, Mussig AJ, Chaumeil PA, Davin AA, Waite DW, Whitman WB, Parks DH, Hugenholtz P. A standardized archaeal taxonomy for the Genome Taxonomy Database. Nat Microbiol 2021; 6:946-959.
    Notes:
    • ⊕ Emendation accompanied by the inclusion of 8 families in the order.
    • 🧍 As of 2023-02-16 this emendation was not yet included in an IJSEM List of Changes in Taxonomic Opinion.

• Notes:
  • 🥇 Nomenclatural type of the class Halomebacteria Cavalier-Smith 2002. Publication: Cavalier-Smith T. The neomuran origin of archaebacteria, the negibacterial root of the universal tree and bacterial megaclassification. Int J Syst Evol Microbiol 2002; 52:7-76.
  • 🥇 Nomenclatural type of the class "Haloarchaeota" Spang et al. 2013. Publication: Spang A, Martijn J, Saw JH, Lind AE, Guy L, Ettema TJ. Close encounters of the third domain: the emerging genomic view of archaeal diversity and evolution. Archaea 2013; 2013:202358.
  • 🧕 Rinke et al. (2021) assigned this order to the phylum "Halobacteriota" Rinke et al. 2021. Publication: Rinke C, Chuvochina M, Mussig AJ, Chaumeil PA, Davin AA, Waite DW, Whitman WB, Parks DH, Hugenholtz P. A standardized archaeal taxonomy for the Genome Taxonomy Database. Nat Microbiol 2021; 6:946-959.
  • 🧒 Cui et al. (2023) assigned the family Haladaptataceae Cui et al. 2023 to this order. Publication: Cui C, Han D, Hou J, Cui HL. Genome-based classification of the class Halobacteria and description of Haladaptataceae fam. nov. and Halorubellaceae fam. nov. Int J Syst Evol Microbiol 2023; 73:5984.
  • 🧒 Cui et al. (2023) assigned the family Halorubellaceae Cui et al. 2023 to this order. Publication: Cui C, Han D, Hou J, Cui HL. Genome-based classification of the class Halobacteria and description of Haladaptataceae fam. nov. and Halorubellaceae fam. nov. Int J Syst Evol Microbiol 2023; 73:5984.
  • 🧒 Grant and Larsen (1989) assigned the genus Halobacterium Elazari-Volcani 1957 (Approved Lists 1980) to this order. Publication: Grant WD, Larsen H. Group 111. Extremely halophilic archaeobacteria. Order Halobacteriales ord. nov. In: Staley JT, Bryant MP, Pfennig N, Holt JG (eds), Bergey's manual of systematic bacteriology, vol. 3., The Williams & Wilkins Co., Baltimore, 1989, p. 2216-2218.
  • 🧒 Rinke et al. (2021) assigned the family "Salinarchaeaceae" to this order. Publication: Rinke C, Chuvochina M, Mussig AJ, Chaumeil PA, Davin AA, Waite DW, Whitman WB, Parks DH, Hugenholtz P. A standardized archaeal taxonomy for the Genome Taxonomy Database. Nat Microbiol 2021; 6:946-959.
  • 🧒 Sorokin et al. (2022) assigned the genus Natranaeroarchaeum Sorokin et al. 2023 to this order. Publication: Sorokin DY, Yakimov M, Messina E, Merkel AY, Koenen M, Bale NJ, Sinninghe Damste JS. Natranaeroarchaeum sulfidigenes gen. nov., sp. nov., carbohydrate-utilizing sulfur-respiring haloarchaeon from hypersaline soda lakes, a member of a new family Natronoarchaeaceae fam. nov. in the order Halobacteriales. Syst Appl Microbiol 2022; 45:126356.
  • 🧒 Sorokin et al. (2022) assigned the genus Natronocalculus Sorokin et al. 2023 to this order. Publication: Sorokin DY, Elcheninov AG, Khizhniak TV, Koenen M, Bale NJ, Damste JSS, Kublanov IV. Natronocalculus amylovorans gen. nov., sp. nov., and Natranaeroarchaeum aerophilus sp. nov., dominant culturable amylolytic natronoarchaea from hypersaline soda lakes in southwestern Siberia. Syst Appl Microbiol 2022; 45:126336.
  • 🙄 This taxon name is occasionally misprinted (or affected by an OCR error) in some sources as: "Haloacteriales"; "Halobactenales"; "Halobocreriales"; "Hulobactenales".
  • 🖹 Minimal standards for the description of new taxa in this group were published in 1997. Publication: Oren A, Ventosa A, Grant WD. Proposed Minimal Standards for Description of New Taxa in the Order Halobacteriales. Int. J. Syst. Evol. Microbiol 1997; 47:233-238.
  • 🖹 Minimal standards for the description of new taxa in this group were published in 1997. Publication: Oren A, Ventosa A, Grant WD. Proposed Minimal Standards for Description of New Taxa in the Order Halobacteriales. Int. J. Syst. Evol. Microbiol. 1997; 47:233-238.
  • 🖹 Minimal standards for the description of new taxa in this group were published in 1997. Publication: Oren A, Ventosa A, Grant WD. Proposed Minimal Standards for Description of New Taxa in the Order Halobacteriales. International Journal of Systematic Bacteriology 1997; 47:233-238.
  • 🖹 Minimal standards for the description of new taxa in this group were published in 2024. Publication: Cui HL, Hou J, Amoozegar MA, Dyall-Smith ML, de la Haba RR, Minegishi H, Montalvo-Rodriguez R, Oren A, Sanchez-Porro C, Ventosa A, et al. Proposed minimal standards for description of new taxa of the class Halobacteria. Int J Syst Evol Microbiol 2024; 74:6290.
  • 🧔 This taxon was discussed in a meeting of a Taxonomic Subcommittee of the ICSP. Publication: Oren A, Ventosa A. International Committee on Systematics of Prokaryotes. Subcommittee on the taxonomy of Halobacteriaceae. Int J Syst Evol Microbiol 2002; 52:289-290.
  • 🧔 This taxon was discussed in a meeting of a Taxonomic Subcommittee of the ICSP. Publication: Oren A, Arahal DR, Ventosa A. International Committee on Systematics of Prokaryotes Subcommittee on the Taxonomy of Halobacteria and Subcommittee on the Taxonomy of Halomonadaceae. Minutes of the joint open meeting, 28 June 2022, Alicante, Spain. Int J Syst Evol Microbiol 2022; 72:5584.
  • 🧔 This taxon was discussed in a meeting of a Taxonomic Subcommittee of the ICSP. Publication: Oren A, Ventosa A. International Committee on Systematics of Prokaryotes Subcommittee on the Taxonomy of Halobacteria. Minutes of the closed meeting, 12 May 2022, via Zoom. Int J Syst Evol Microbiol 2022; 72:5499.
  • 🧔 This taxon was discussed in a meeting of a Taxonomic Subcommittee of the ICSP. Publication: Oren A, Ventosa A. International Committee on Systematic Bacteriology Subcommittee on the taxonomy of Halobacteriaceae. Minutes of the meetings, 16 August 1999, Sydney, Australia. Int J Syst Evol Microbiol 2000; 50:1405-1407.
  • 🧔 This taxon was discussed in a meeting of a Taxonomic Subcommittee of the ICSP. Publication: Oren A, Ventosa A. International Committee on Systematics of Prokaryotes Subcommittee on the taxonomy of Halobacteriaceae and Subcommittee on the taxonomy of Halomonadaceae. Minutes of the meeting 30 June 2010, Beijing, China. Int. J. Syst. Evol. Microbiol. 2010; 60:2257-2259.
  • 🧔 This taxon was discussed in a meeting of a Taxonomic Subcommittee of the ICSP. Publication: Arahal DR, Oren A, Ventosa A. International Committee on Systematics of Prokaryotes Subcommittee on the taxonomy of Halobacteriaceae and Subcommittee on the taxonomy of Halomonadaceae Minutes of the joint open meeting, 6 September 2011, Sapporo, Japan. Int. J. Syst. Evol. Microbiol. 2011; 61:2792-2795.
  • 🧔 This taxon was discussed in a meeting of a Taxonomic Subcommittee of the ICSP. Publication: . International Committee on Systematics of Prokaryotes. Subcommittee on the taxonomy of Halobacteriaceae. Int J Syst Evol Microbiol 2002; 52:289-290.
  • 🧔 This taxon was discussed in a meeting of a Taxonomic Subcommittee of the ICSP. Publication: A. Oren AV. International Committee on Systematics of Prokaryotes; Subcommittee on the taxonomy of Halobacteriaceae. Int. J. Syst. Evol. Microbiol 2008; 58:2465-2467.
  • 🧔 This taxon was discussed in a meeting of a Taxonomic Subcommittee of the ICSP. Publication: A. Oren AV. International Committee on Systematics of Prokaryotes; Subcommittee on the taxonomy of Halobacteriaceae. Int. J. Syst. Evol. Microbiol. 2008; 58:2465-2467.
  • 🧔 This taxon was discussed in a meeting of a Taxonomic Subcommittee of the ICSP. Publication: Nair GB, Holmes B. International Committee on Systematics of Prokaryotes. Subcommittee on the taxonomy of Halobacteriaceae. Int J Syst Evol Microbiol 2002; 52:289-290.
  • 🎰 The BRCs most frequently used for deposits in this group are: JCM: 435; CGMCC: 279; DSM: 151; CECT: 82; ATCC: 72; NBRC: 54; KCTC: 46; CIP: 46; VKM: 39; NCIMB: 38.
  • 🧍 See also Papke et al. (2011). Publication: Papke RT, White E, Reddy P, Weigel G, Kamekura M, Minegishi H, Usami R, Ventosa A. A multilocus sequence analysis approach to the phylogeny and taxonomy of the Halobacteriales. Int J Syst Evol Microbiol 2011; 61:2984-2995.
  • 🧍 On the Validation List no. 31, in violation of Rules 15 and 21a, the nomenclatural type is given as Halobacteriaceae Gibbons 1974 (Approved Lists 1980). It should be noted that the correct nomenclatural type is cited in the effective publication. Publication: DasSarma P, DasSarma S. On the origin of prokaryotic "species": the taxonomy of halophilic Archaea. Saline Syst 2008; 4:5.
  • 🧍 See also: Publication: Oren A. Nomenclature and taxonomy of halophilic archaea--comments on the proposal by DasSarma and DasSarma for nomenclatural changes within the order Halobacteriales. Int J Syst Evol Microbiol 2008; 58:2245-2246.

Subdivision:

Number of child taxa with a validly published and correct name: 7
Number of child taxa with a validly published name, including synonyms: 11
Total number of child taxa: 13

• Child taxa:

  • Name	Nomenclatural status	Taxonomic status
    Haladaptataceae Chuvochina et al. 2024	validly published under the ICNP, illegitimate name	synonym
    Haladaptataceae Cui et al. 2023	validly published under the ICNP	synonym
    Halalkalicoccaceae Mao et al. 2025	validly published under the ICNP	correct name
    "Halalkalicoccaceae" Rinke et al. 2021	not validly published	synonym
    Haloarculaceae Gupta et al. 2016	validly published under the ICNP	correct name
    Halobacteriaceae Gibbons 1974 (Approved Lists 1980)	validly published under the ICNP	correct name
    Halococcaceae Gupta et al. 2016	validly published under the ICNP	correct name
    Haloferacaceae Gupta et al. 2015	validly published under the ICNP	correct name
    Halorubellaceae Cui et al. 2023	validly published under the ICNP	synonym
    Halorubraceae Gupta et al. 2016	validly published under the ICNP	synonym
    Natrialbaceae Gupta et al. 2015	validly published under the ICNP	correct name
    Natronoarchaeaceae Sorokin et al. 2023	validly published under the ICNP	correct name
    "Natronomonadaceae" Zhu et al. 2025	not validly published	synonym

Parent taxon: Halobacteria Grant et al. 2002

Assigned by: Gupta RS, Naushad S, Baker S. Phylogenomic analyses and molecular signatures for the class Halobacteria and its two major clades: a proposal for division of the class Halobacteria into an emended order Halobacteriales and two new orders, Haloferacales ord. nov. and Natrialbales ord. nov., containing the novel families Haloferacaceae fam. nov. and Natrialbaceae fam. nov. Int J Syst Evol Microbiol 2015; 65:1050-1069.

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Record number: 5038