Name: Halobacterium volcanii Mullakhanbhai and Larsen 1975 (Approved Lists 1980)

Category: Species

Proposed as: sp. nov.

Etymology: vol.ca’ni.i. N.L. gen. masc. n. volcanii, of Volcani, named after Israeli microbiologist B.E. Volcani, discoverer of life in the Dead Sea

Pronunciation (Latin), gender: ha-lo-bak-TE-ri-um wol-KA-ni-i, neuter

Type strain: ATCC 29605; DS2; DSM 3757; IFO 14742; JCM 8879; NBRC 14742; NCCB 85050; NCIMB 2012; NCMB 2012; VKM B-1768

See detailed strain information at

Conduct genome-based taxonomy at

16S rRNA gene: AB663383 Analyse FASTA

Effective publication: Mullakhanbhai MF, Larsen H. Halobacterium volcanii spec. nov., a Dead Sea halobacterium with a moderate salt requirement. Arch Microbiol 1975; 104:207-214.

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: synonym

Correct name: Haloferax volcanii (Mullakhanbhai and Larsen 1975) Torreblanca et al. 1986

Risk group: 1

• Synonyms:

  • Name	Kind
    Haloferax lucentense corrig. Gutiérrez et al. 2004	heterotypic synonym, validly published under the ICNP
    "Haloferax alicantei" Holmes et al. 1997	heterotypic synonym, not validly published
    Haloferax lucentensis Gutiérrez et al. 2004	heterotypic synonym, inaccurate spelling
    Haloferax volcanii (Mullakhanbhai and Larsen 1975) Torreblanca et al. 1986	homotypic synonym, validly published under the ICNP
    Haloferax alexandrinus Asker and Ohta 2002	heterotypic synonym, inaccurate spelling
    Haloferax alexandrinum corrig. Asker and Ohta 2002	heterotypic synonym, validly published under the ICNP

• Notes:
  • ⏰ According to Quadri et al. (2024), this species is an earlier heterotypic synonym of Haloferax lucentensis Gutiérrez et al. 2004. Publication: Quadri SR, Jin P, Wang K, Qiao H, Dhulappa A, Luo ZH, Wang S, Narsing Rao MP. Taxonomic Reframe of Some Species of the Genera Haloferax and Halobellus. Curr Microbiol 2024; 81:216. 🇨🇳
  • ⏰ According to Quadri et al. (2024), this species is an earlier heterotypic synonym of "Haloferax alicantei" Holmes et al. 1997. Publication: Quadri SR, Jin P, Wang K, Qiao H, Dhulappa A, Luo ZH, Wang S, Narsing Rao MP. Taxonomic Reframe of Some Species of the Genera Haloferax and Halobellus. Curr Microbiol 2024; 81:216. 🇨🇳
  • ⏰ According to Quadri et al. (2024), this species is an earlier heterotypic synonym of Haloferax alexandrinus Asker and Ohta 2002. Publication: Quadri SR, Jin P, Wang K, Qiao H, Dhulappa A, Luo ZH, Wang S, Narsing Rao MP. Taxonomic Reframe of Some Species of the Genera Haloferax and Halobellus. Curr Microbiol 2024; 81:216. 🇨🇳
  • ⏰ According to Quadri et al. (2024), this species is an earlier heterotypic synonym of Haloferax lucentense corrig. Gutiérrez et al. 2004. Publication: Quadri SR, Jin P, Wang K, Qiao H, Dhulappa A, Luo ZH, Wang S, Narsing Rao MP. Taxonomic Reframe of Some Species of the Genera Haloferax and Halobellus. Curr Microbiol 2024; 81:216. 🇨🇳
  • ⏰ According to Quadri et al. (2024), this species is an earlier heterotypic synonym of Haloferax alexandrinum corrig. Asker and Ohta 2002. Publication: Quadri SR, Jin P, Wang K, Qiao H, Dhulappa A, Luo ZH, Wang S, Narsing Rao MP. Taxonomic Reframe of Some Species of the Genera Haloferax and Halobellus. Curr Microbiol 2024; 81:216. 🇨🇳
  • ⏰ According to Tan et al. (2024), this species is an earlier heterotypic synonym of Haloferax lucentensis Gutiérrez et al. 2004. Publication: Tan S, Zhu LR, Zhang QK, Dong XY, Hou J, Cui HL. Genome-based classification of the family Haloferacaceae and description of five novel species of Halobaculum. Extremophiles 2024; 28:22. 🇨🇳
  • ⏰ According to Tan et al. (2024), this species is an earlier heterotypic synonym of "Haloferax alicantei" Holmes et al. 1997. Publication: Tan S, Zhu LR, Zhang QK, Dong XY, Hou J, Cui HL. Genome-based classification of the family Haloferacaceae and description of five novel species of Halobaculum. Extremophiles 2024; 28:22. 🇨🇳
  • ⏰ According to Tan et al. (2024), this species is an earlier heterotypic synonym of Haloferax alexandrinus Asker and Ohta 2002. Publication: Tan S, Zhu LR, Zhang QK, Dong XY, Hou J, Cui HL. Genome-based classification of the family Haloferacaceae and description of five novel species of Halobaculum. Extremophiles 2024; 28:22. 🇨🇳
  • ⏰ According to Tan et al. (2024), this species is an earlier heterotypic synonym of Haloferax lucentense corrig. Gutiérrez et al. 2004. Publication: Tan S, Zhu LR, Zhang QK, Dong XY, Hou J, Cui HL. Genome-based classification of the family Haloferacaceae and description of five novel species of Halobaculum. Extremophiles 2024; 28:22. 🇨🇳
  • ⏰ According to Tan et al. (2024), this species is an earlier heterotypic synonym of Haloferax alexandrinum corrig. Asker and Ohta 2002. Publication: Tan S, Zhu LR, Zhang QK, Dong XY, Hou J, Cui HL. Genome-based classification of the family Haloferacaceae and description of five novel species of Halobaculum. Extremophiles 2024; 28:22. 🇨🇳
  • 🏢 Synonymy of this taxon was mentioned in an IJSEM list. Publication: Oren A, Göker M. List of changes in taxonomic opinion no. 40. Notification of changes in taxonomic opinion previously published outside the IJSEM. Int J Syst Evol Microbiol 2024; 74:6482.
  • 🏢 Synonymy of this taxon was mentioned in an IJSEM list. Publication: Oren A, Göker M. List of changes in taxonomic opinion no. 41. Notification of changes in taxonomic opinion previously published outside the IJSEM. Int J Syst Evol Microbiol 2025; 75:6561.
  • ❗ Halobacterium volcanii is the correct name instead if this species is regarded as a separate species (i.e., if its nomenclatural type is not assigned to another species whose name is validly published, legitimate and not rejected and has priority) within a separate genus Halobacterium.
  • 😷 The risk group for Canada has been imported on 2024-02-27. The full classification is: risk group = 1, note = "Animal classification RG: 1 - Security sensitive biological agent: No - Terrestrial animal pathogen under Canadian Food Inspection Agency authority: No - Containment level: Containment Level 1". — The risk group for Swiss Confederation has been imported on 2024-02-01. The full classification is: risk group = 1. — The risk group for Germany has been imported on 2023-10-29. The full classification is: risk group = 1. — If in doubt, use the risk group given in the regulations for your country and, if these are not available, use the risk group given in the catalogue of the culture collection from which you have obtained or intend to obtain the strain.
  • 🎓 Name mentioned 46 times in PubMed until 2026-06-11.
  • 🧍 On the Approved Lists of Bacterial Names, and on the Approved Lists of Bacterial Names (Amended Edition), this taxon is incorrectly cited as Halobacterium volcanii Mullakhanbhai and Larson (sic) 1975. Publication: Larsen H. Genus I. Halobacterium Elazari-Volcani 1957, 207AL. In: Krieg NR, Holt JG (eds), Bergey's Manual of Systematic Bacteriology, first edition, vol. 1, The Williams & Wilkins Co., Baltimore, 1984, p. 262-266.

Parent taxon: Halobacterium Elazari-Volcani 1957 (Approved Lists 1980)

Assigned by: Mullakhanbhai MF, Larsen H. Halobacterium volcanii spec. nov., a Dead Sea halobacterium with a moderate salt requirement. Arch Microbiol 1975; 104:207-214.

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Record number: 776716