Species Bacillus macyae

Name: Bacillus macyae Santini et al. 2004

Category: Species

Proposed as: sp. nov.

Etymology: ma’cy.ae. N.L. gen. fem. n. macyae, of Macy, named after the professor Joan M. Macy, Chair of Microbiology, La Trobe University, in tribute to her research in the area of environment microbiology

Pronunciation (Latin), gender: ba-KIL-lus MA-ky-a͡e, masculine

Type strain: DSM 16346; JCM 12340; JMM-4

See detailed strain information at

16S rRNA gene: AY032601 Analyse FASTA

Valid publication: Santini JM, Streimann IC, vanden Hoven RN. Bacillus macyae sp. nov., an arsenate-respiring bacterium isolated from an Australian gold mine. Int J Syst Evol Microbiol 2004; 54:2241-2244. 🇦🇺

IJSEM list: Euzeby JP. Notification list. Notification that new names and new combinations have appeared in volume 54, part 6 of the IJSEM. Int J Syst Evol Microbiol 2005; 55:551-554.

Nomenclatural status: validly published under the ICNP

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

Correct name: Pseudalkalibacillus hwajinpoensis (Yoon et al. 2004) Joshi et al. 2022

Risk group: 1

Synonyms:

Name	Kind
"Anaerobacillus macyae" (Santini et al. 2004) Zavarzina et al. 2009	homotypic synonym, not validly published
Alkalihalobacillus hwajinpoensis (Yoon et al. 2004) Patel and Gupta 2020	heterotypic synonym, validly published under the ICNP
Alkalihalobacillus macyae (Santini et al. 2004) Patel and Gupta 2020	homotypic synonym, validly published under the ICNP
Bacillus hwajinpoensis Yoon et al. 2004	heterotypic synonym, validly published under the ICNP
Guptibacillus hwajinpoensis (Yoon et al. 2004) Bello et al. 2025	heterotypic synonym, validly published under the ICNP
Pseudalkalibacillus hwajinpoensis (Yoon et al. 2004) Joshi et al. 2022	heterotypic synonym, validly published under the ICNP
"Pseudalkalibacillus macyae" (Santini et al. 2004) Joshi et al. 2021	homotypic synonym, not validly published

Notes:
- ⏲ According to Bello et al. (2025), this species is a later heterotypic synonym of Alkalihalobacillus hwajinpoensis (Yoon et al. 2004) Patel and Gupta 2020. Publication: Bello S, Rudra B, Schellhorn HE. Phylogenomic studies and molecular markers clarifying the evolutionary relationships and classification of Pseudalkalibacillus species: proposal for the family Guptibacillaceae fam. nov. harbouring the genera Guptibacillus gen. nov. and Exobacillus gen. nov. Int J Syst Evol Microbiol 2025; 75:6757. 🇨🇦
- ⏲ According to Bello et al. (2025), this species is a later heterotypic synonym of Bacillus hwajinpoensis Yoon et al. 2004. Publication: Bello S, Rudra B, Schellhorn HE. Phylogenomic studies and molecular markers clarifying the evolutionary relationships and classification of Pseudalkalibacillus species: proposal for the family Guptibacillaceae fam. nov. harbouring the genera Guptibacillus gen. nov. and Exobacillus gen. nov. Int J Syst Evol Microbiol 2025; 75:6757. 🇨🇦
- ⏲ According to Bello et al. (2025), this species is a later heterotypic synonym of Pseudalkalibacillus hwajinpoensis (Yoon et al. 2004) Joshi et al. 2022. Publication: Bello S, Rudra B, Schellhorn HE. Phylogenomic studies and molecular markers clarifying the evolutionary relationships and classification of Pseudalkalibacillus species: proposal for the family Guptibacillaceae fam. nov. harbouring the genera Guptibacillus gen. nov. and Exobacillus gen. nov. Int J Syst Evol Microbiol 2025; 75:6757. 🇨🇦
- ⏲ According to Bello et al. (2025), this species is a later heterotypic synonym of Guptibacillus hwajinpoensis (Yoon et al. 2004) Bello et al. 2025. Publication: Bello S, Rudra B, Schellhorn HE. Phylogenomic studies and molecular markers clarifying the evolutionary relationships and classification of Pseudalkalibacillus species: proposal for the family Guptibacillaceae fam. nov. harbouring the genera Guptibacillus gen. nov. and Exobacillus gen. nov. Int J Syst Evol Microbiol 2025; 75:6757. 🇨🇦
- 🏢 Synonymy of this taxon was mentioned in an IJSEM list. Publication: Oren A, Göker M. Notification list. Notification that new names and new combinations have appeared in volume 75, part 5 of the IJSEM. Int J Syst Evol Microbiol 2025; 75:6824.
- ❗ Bacillus macyae 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 Germany has been imported on 2026-08-13. 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 1 time in PubMed until 2026-06-11.
- 🙅 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.
- 🧍 The type strain JCM 12340 does not appear in the JCM on-line catalogue of strains. According to the JCM, the stock culture of JCM 12340 does not grow. — Sakamoto M. Personal communication, 2010-01-27.

Parent taxon: Bacillus Cohn 1872 (Approved Lists 1980)

Assigned by: Santini JM, Streimann IC, vanden Hoven RN. Bacillus macyae sp. nov., an arsenate-respiring bacterium isolated from an Australian gold mine. Int J Syst Evol Microbiol 2004; 54:2241-2244. 🇦🇺

Linking: To permanently link to this page, use https://doi.org/10.83108/rn.773763Link copied to clipboard

Record number: 773763

This LPSN page was printed on 2026-09-13 11:45:25

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Species Bacillus macyae