Name: Aquaspirillum metamorphum (Terasaki 1961) Hylemon et al. 1973 (Approved Lists 1980)

Category: Species

Proposed as: comb. nov.

Basonym: "Spirillum metamorphum" Terasaki 1961

Etymology: me.ta.mor’phum. N.L. neut. adj. metamorphum, changing

Gender: neuter

Type strain: ATCC 15280; CCUG 13794; DSM 1837; IFO 13960; NBRC 13960; VKM B-1407

See detailed strain information at

Conduct genome-based taxonomy at

16S rRNA gene: Y18618 Analyse FASTA

Effective 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.

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

Correct name: Simplicispira metamorpha (Terasaki 1961) Grabovich et al. 2006

Risk group: 1

• Synonyms:

  • Name	Kind
    Simplicispira metamorpha (Terasaki 1961) Grabovich et al. 2006	homotypic synonym, validly published under the ICNP
    "Spirillum metamorphum" Terasaki 1961	homotypic synonym, not validly published, basonym of name in Approved Lists

• Notes:
  • ❗ Aquaspirillum metamorphum 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 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 2023-10-29. The full classification is: risk group = 1.
  • 🎓 Name mentioned 2 times in PubMed until 2024-03-28.

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

Assigned by: Hylemon PB, Wells Jr. JS, Krieg NR, Jannasch HW. The genus Spirillum: A taxonomic study. International Journal of Systematic Bacteriology 1973; 23:340-380.

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Record number: 773332