Species Haloferax alexandrinum

Name: Haloferax alexandrinum corrig. Asker and Ohta 2002

Category, proposed as: species, sp. nov.

Etymology: a.le.xan.dri.num. N.L. neut. adj. alexandrinum, pertaining to Alexandria, a city in Egypt, where the strain was isolated

Gender: neuter

Type strain: CIP 107620; DSM 27206; IFO 16590; JCM 10717; KCTC 12962; NBRC 16590; TM

See detailed strain information at

Conduct genome-based taxonomy at

16S rRNA gene: AB663373 Analyse FASTA

Valid publication: Asker D, Ohta Y. Haloferax alexandrinus sp. nov., an extremely halophilic canthaxanthin-producing archaeon from a solar saltern in Alexandria (Egypt). Int J Syst Evol Microbiol 2002; 52:729-738. 🇯🇵

IJSEM list: Anonymous. Notification list. Notification that new names and new combinations have appeared in volume 52, part 3 of the IJSEM. Int J Syst Evol Microbiol 2002; 52:1077-1079.

Nomenclatural status: validly published under the ICNP

Taxonomic status: synonym

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

• 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
    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	other spelling of name, inaccurate spelling

• 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 alexandrinum 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.
  • 🙂 Spelling correction conducted by LPSN on 2022-10-07.
  • 🎓 Name mentioned 1 time in PubMed until 2026-06-11.

Parent taxon: Haloferax Torreblanca et al. 1986

Assigned by: Asker D, Ohta Y. Haloferax alexandrinus sp. nov., an extremely halophilic canthaxanthin-producing archaeon from a solar saltern in Alexandria (Egypt). Int J Syst Evol Microbiol 2002; 52:729-738. 🇯🇵

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Record number: 30175