Name: "Haloferax alicantei" Holmes et al. 1997

Category: Species

Proposed as: sp. nov.

Etymology: a.li.can’te.i. N.L. gen. masc. n. alicantei, from M. Torrenblanca, University of Alicante, Alicante, Spain

Pronunciation (Latin), gender: ha-LO-fe-rax a-li-KAN-te-i, neuter

Nomenclatural type: 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

Original 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. 🇦🇺

Nomenclatural status: not validly published

Taxonomic status: synonym (and no standing)

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

• Synonyms:

  • Name	Kind
    Haloferax lucentense corrig. Gutiérrez et al. 2004	homotypic synonym, validly published under the ICNP
    Haloferax lucentensis Gutiérrez et al. 2004	homotypic 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	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.
  • 🤦 This taxon lacks a discernible description (protologue).
  • 🧍 "Haloferax alicantei" Holmes et al. is now known as Haloferax lucentense corrig. Gutierrez et al. 2004, sp. nov. 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. 🇪🇸

Parent taxon: Haloferax Torreblanca et al. 1986

Assigned by: 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. 🇦🇺

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Record number: 800998