Name: Haloferax lucentense corrig. Gutiérrez et al. 2004

Category: Species

Proposed as: sp. nov.

Etymology: lu.cen.ten’se. L. neut. adj. lucentense, pertaining to the city of Lucentum, Alicante, Spain

Pronunciation (Latin), gender: ha-LO-fe-rax lu-ken-TEN-se, neuter

Type strain: Aa 2.2; CCM 7023; CECT 5871; CIP 107410; DSM 14919; JCM 9276; NCIMB 13854

See detailed strain information at

Conduct genome-based taxonomy at

16S rRNA gene: AB081732 Analyse FASTA

Effective publication: Gutierrez MC, Kamekura M, Holmes ML, Dyall-Smith ML, Ventosa A. Taxonomic characterization of Haloferax sp. (" H. alicantei") strain Aa 2.2: description of Haloferax lucentensis sp. nov. Extremophiles 2002; 6:479-483. 🇪🇸

IJSEM list: Euzeby JP. Validation list no. 95. List of new names and new combinations previously effectively, but not validly, published. Int J Syst Evol Microbiol 2004; 54:1-2.

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 alicantei" Holmes et al. 1997	homotypic synonym, not validly published
    Haloferax lucentensis Gutiérrez et al. 2004	other spelling of name, inaccurate spelling
    Halobacterium volcanii Mullakhanbhai and Larsen 1975 (Approved Lists 1980)	heterotypic synonym, validly published under the ICNP
    Haloferax volcanii (Mullakhanbhai and Larsen 1975) Torreblanca et al. 1986	heterotypic 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 a later heterotypic synonym of Halobacterium volcanii Mullakhanbhai and Larsen 1975 (Approved Lists 1980). 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 a later heterotypic synonym of Haloferax volcanii (Mullakhanbhai and Larsen 1975) Torreblanca et al. 1986. 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 a later heterotypic synonym of Halobacterium volcanii Mullakhanbhai and Larsen 1975 (Approved Lists 1980). 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 a later heterotypic synonym of Haloferax volcanii (Mullakhanbhai and Larsen 1975) Torreblanca et al. 1986. 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.
  • ❗ Haloferax lucentense 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 Haloferax.
  • 😷 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 9 times in PubMed until 2026-06-11.
  • 🧍 Haloferax lucentense corrig. Gutierrez et al. 2004 was previously known as Haloferax sp., or Haloferax phenon K, or "Haloferax alicantei" Holmes et al. Publication: Holmes ML, Scopes RK, Moritz RL, Simpson RJ, Englert C, Pfeifer F, Dyall-Smith ML. Purification and analysis of an extremely halophilic beta-galactosidase from Haloferax alicantei. Biochim Biophys Acta 1997; 1337:276-286. 🇦🇺
  • 🧍 The original spelling of the specific epithet, lucentensis (sic), has been corrected on validation according to Rule 61. Publication: Euzeby JP. Validation list no. 95. List of new names and new combinations previously effectively, but not validly, published. Int J Syst Evol Microbiol 2004; 54:1-2.

Parent taxon: Haloferax Torreblanca et al. 1986

Assigned by: Gutierrez MC, Kamekura M, Holmes ML, Dyall-Smith ML, Ventosa A. Taxonomic characterization of Haloferax sp. (" H. alicantei") strain Aa 2.2: description of Haloferax lucentensis sp. nov. Extremophiles 2002; 6:479-483. 🇪🇸

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Record number: 776740