Subspecies Aquaspirillum itersonii subsp. itersonii

Name: Aquaspirillum itersonii subsp. itersonii (Giesberger 1936) Terasaki 1979 (Approved Lists 1980)

Category, proposed as: subspecies, subsp. nov. (rule 40d)

Basonym: "Spirillum itersonii" Giesberger 1936

Etymology: i.ter.so’ni.i. N.L. gen. masc. n. itersonii, referring to Iterson

Pronunciation (Latin), gender: a-kwa-spi-RIL-lum i-ter-SO-ni-i i-ter-SO-ni-i, neuter

Type strain: ATCC 12639; CCUG 49447; CIP 105798; Giesberger; IFO 15648; JCM 21278; JCM 21494; LMG 4337; NBRC 15648; NCIB 9070; NCIMB 9070; NRRL B-2053

See detailed strain information at

Effective publication: Terasaki Y. Transfer of five species and two subspecies of Spirillum to other genera (Aquaspirillum and Oceanospirillum), with emended descriptions of the species and subspecies. International Journal of Systematic Bacteriology 1979; 29:130-144.

IJSEM list: Skerman VBD, McGowan V, Sneath PHA. Approved lists of bacterial names. Int J Syst Bacteriol 1980; 30:225-420.

Nomenclatural status: validly published under the ICNP

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

Correct name: Novispirillum itersonii subsp. itersonii (Giesberger 1936) Yoon et al. 2007

Risk group: 1

• Synonyms:

  • Name	Kind
    "Levispirillum itersonii subsp. itersonii" (Giesberger 1936) Pot and Gillis 2005	homotypic synonym, not validly published
    Novispirillum itersonii subsp. itersonii (Giesberger 1936) Yoon et al. 2007	homotypic synonym, validly published under the ICNP

• Notes:
  • 📠 This subspecies was automatically created by the valid publication of Aquaspirillum itersonii subsp. nipponicum (Terasaki 1973) Terasaki 1979 (Approved Lists 1980) according to rule 40d. Publication: Terasaki Y. Transfer of five species and two subspecies of Spirillum to other genera (Aquaspirillum and Oceanospirillum), with emended descriptions of the species and subspecies. International Journal of Systematic Bacteriology 1979; 29:130-144.
  • ❗ Aquaspirillum itersonii subsp. itersonii is the correct name instead if this subspecies is regarded as a separate subspecies (i.e., if its nomenclatural type is not assigned to another subspecies whose name is validly published, legitimate and not rejected and has priority) within a separate species Aquaspirillum itersonii within a separate genus Aquaspirillum.
  • 😷 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 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.
  • 🙅 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 subspecies. The name is on LoRN because of the recorded risk group of the genus.
  • 🧍 Cited erroneously as synonym of Aquaspirillum serpens until April 1994 in DSMZ List. Publication: Hylemon PB, Wells Jr JS, Krieg NR, Jannasch HW. The genus Spirillum: a taxonomic study. International Journal of Systematic Bacteriology 1973; 23:340-380.
  • 🧍 The original authorship, (Giesberger 1936) Hylemon et al. 1973, was corrected according to the new Rule 40d. Publication: Garrity GM, Labeda DP, Oren A. Judicial Commission of the International Committee on Systematics of Prokaryotes. XIIth International (IUMS) Congress of Bacteriology and Applied Microbiology. Minutes of the meetings, 3, 4 and 6 August 2008, Istanbul, Turkey. Int. J. Syst. Evol. Microbiol. 2011; 61:2775-2780. 🇺🇸

Parent taxon: Aquaspirillum itersonii (Giesberger 1936) Hylemon et al. 1973 (Approved Lists 1980)

Assigned by: Terasaki Y. Transfer of five species and two subspecies of Spirillum to other genera (Aquaspirillum and Oceanospirillum), with emended descriptions of the species and subspecies. International Journal of Systematic Bacteriology 1979; 29:130-144.

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Record number: 787030