Species Bacillus halodurans

Name: Bacillus halodurans (ex Boyer et al. 1973) Nielsen et al. 1995

Category: Species

Proposed as: sp. nov., nom. rev.

Etymology: ha.lo.du’rans. Gr. masc. n. hals (gen. halos), salt; L. pres. part. durans, enduring; N.L. masc. part. adj. halodurans, salt-enduring

Pronunciation (Latin), gender: … ha-lo-DU-rans, masculine

Type strain: ATCC 27557; CIP 105296; DSM 497; LMG 7121; NRRL B-3881; Strain PN-80

Conduct genome-based taxonomy at

16S rRNA gene: AJ302709 Analyse FASTA

Effective publication: Nielsen P, Fritze D, Priest FG. Phenetic diversity of alkaliphilic Bacillus strains: proposal for nine new species. Microbiology 1995; 141:1745-1761. 🇩🇪

IJSEM list: Anonymous. Validation list no. 55. Validation of publication of new names and new combinations previously effectively published outside the IJSB. Int J Syst Bacteriol 1995; 45:879-880.

Nomenclatural status: validly published under the ICNP

Taxonomic status: synonym (and not recommended for medical use)

Correct name: Halalkalibacterium halodurans (Nielsen et al. 1995 ex Boyer et al. 1973) Joshi et al. 2022

Risk group: 1

Synonyms:

Name	Kind
Bacillus okuhidensis Li et al. 2002	heterotypic synonym, validly published under the ICNP
"Bacillus alcalophilus subsp. halodurans" Boyer et al. 1973	homotypic synonym, not validly published, distinct rank
Alkalihalobacillus okuhidensis (Li et al. 2002) Patel and Gupta 2020	heterotypic synonym, validly published under the ICNP
Alkalihalobacillus halodurans (Nielsen et al. 1995 ex Boyer et al. 1973) Patel and Gupta 2020	homotypic synonym, validly published under the ICNP
Halalkalibacterium halodurans (Nielsen et al. 1995 ex Boyer et al. 1973) Joshi et al. 2022	homotypic synonym, validly published under the ICNP

Emendations:
- Liu et al. 2019 Liu GH, Narsing Rao MP, Dong ZY, Wang JP, Che JM, Chen QQ, Sengonca C, Liu B, Li WJ. Genome-based reclassification of Bacillus okuhidensis as a later heterotypic synonym of Bacillus halodurans. Int J Syst Evol Microbiol 2019; 69:3599-3602. 🇨🇳 Oren A, Garrity GM. Notification list. Notification that new names and new combinations have appeared in volume 69, part 11 of the IJSEM. Int J Syst Evol Microbiol 2020; 70:705-707.

Notes:
- ⏰ According to Joshi et al. (2021), this species is an earlier heterotypic synonym of Alkalihalobacillus okuhidensis (Li et al. 2002) Patel and Gupta 2020. Publication: Joshi A, Thite S, Karodi P, Joseph N, Lodha T. Alkalihalobacterium elongatum gen. nov. sp. nov.: An Antibiotic-Producing Bacterium Isolated From Lonar Lake and Reclassification of the Genus Alkalihalobacillus Into Seven Novel Genera. Front Microbiol 2021; 12:722369. 🇮🇳
- ⏰ According to Joshi et al. (2021), this species is an earlier heterotypic synonym of Bacillus okuhidensis Li et al. 2002. Publication: Joshi A, Thite S, Karodi P, Joseph N, Lodha T. Alkalihalobacterium elongatum gen. nov. sp. nov.: An Antibiotic-Producing Bacterium Isolated From Lonar Lake and Reclassification of the Genus Alkalihalobacillus Into Seven Novel Genera. Front Microbiol 2021; 12:722369. 🇮🇳
- 🏢 Synonymy of this taxon was mentioned in an IJSEM list. Publication: Oren A, Garrity GM. List of changes in taxonomic opinion no. 36. Notification of changes in taxonomic opinion previously published outside the IJSEM. Int J Syst Evol Microbiol 2022; 72:5413.
- ❗ Bacillus halodurans 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 Bacillus.
- 😷 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 285 times in PubMed until 2025-06-04.
- 🙅 This name is on the List of Recommended Names for bacteria of medical importance (LoRN) as a synonym of the name to be applied to this species. The name is on LoRN because of the recorded risk group of other species in the genus.
- 🧍 Nom. rev. / basonym "Bacillus alcalophilus subsp. halodurans". Publication: Takii Y, Kuriyama N, Suzuki Y. Alkaline serine protease produced from citric acid by Bacillus alcalophilus subsp. halodurans KP 1239. Appl Microbiol Biotechnol 1990; 34:57-62.

Parent taxon: Bacillus Cohn 1872 (Approved Lists 1980)

Assigned by: Nielsen P, Fritze D, Priest FG. Phenetic diversity of alkaliphilic Bacillus strains: proposal for nine new species. Microbiology 1995; 141:1745-1761. 🇩🇪

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Record number: 773725

This LPSN page was printed on 2026-02-11 13:12:02

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Species Bacillus halodurans