Name: Paraliobacillus ryukyuensis Ishikawa et al. 2003

Category: Species

Proposed as: sp. nov.

Etymology: ryu.kyu.en’sis. N.L. masc. adj. ryukyuensis, from the Ryukyu Islands, Japan, where the type strain was isolated

Pronunciation, gender: ryu-kyu-EN-sis, masculine

Type strain: DSM 15140; IAM 15001; JCM 21472; NBRC 100001; NRIC 520; O15-7

See detailed strain information at

Conduct genome-based taxonomy at

16S rRNA gene: AB087828 Analyse FASTA

Effective publication: Ishikawa M, Ishizaki S, Yamamoto Y, Yamasato K. Paraliobacillus ryukyuensis gen. nov., sp. nov., a new Gram-positive, slightly halophilic, extremely halotolerant, facultative anaerobe isolated from a decomposing marine alga. J Gen Appl Microbiol 2002; 48:269-279.

IJSEM list: Euzeby JP. Validation list no. 91. List of new names and new combinations previously effectively, but not validly, published. Int J Syst Evol Microbiol 2003; 53:627-628.

Nomenclatural status: validly published under the ICNP

Taxonomic status: correct name

Risk group: 1

• Notes:
  • 🥇 Nomenclatural type of the genus Paraliobacillus Ishikawa et al. 2003. Publication: Ishikawa M, Ishizaki S, Yamamoto Y, Yamasato K. Paraliobacillus ryukyuensis gen. nov., sp. nov., a new Gram-positive, slightly halophilic, extremely halotolerant, facultative anaerobe isolated from a decomposing marine alga. J Gen Appl Microbiol 2002; 48:269-279.
  • 😷 The risk group for Canada has been imported on 2024-02-27. The full classification is: risk group = 1, note = "Animal classification RG: 2 - Security sensitive biological agent: No - Terrestrial animal pathogen under Canadian Food Inspection Agency authority: No - Containment level: Containment Level 2". — 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 7 times in PubMed until 2025-06-04.
  • 🧍 According to Ludwig et al. (2021), this "species affiliates within the genus Amphibacillus and may be reclassified". Publication: Ludwig W, Viver T, Westram R, Francisco Gago J, Bustos-Caparros E, Knittel K, Amann R, Rossello-Mora R. Release LTP_12_2020, featuring a new ARB alignment and improved 16S rRNA tree for prokaryotic type strains. Syst Appl Microbiol 2021; 44:126218.
  • 🧍 In the effective publication, the type strain NBRC 100001 is erroneously cited as NBRC 10001. — Leibniz Institute DSMZ. Prokaryotic Nomenclature Up-to-date, 2018-12-11.

Parent taxon: Paraliobacillus Ishikawa et al. 2003

Assigned by: Ishikawa M, Ishizaki S, Yamamoto Y, Yamasato K. Paraliobacillus ryukyuensis gen. nov., sp. nov., a new Gram-positive, slightly halophilic, extremely halotolerant, facultative anaerobe isolated from a decomposing marine alga. J Gen Appl Microbiol 2002; 48:269-279.

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Record number: 779170