Name: Nitrosolobus multiformis Watson et al. 1971 (Approved Lists 1980)

Category: Species

Proposed as: sp. nov.

Etymology: mul.ti.for’mis. L. masc. adj. multus, many; L. fem. n. forma, shape; L. masc. adj. multiformis, many shapes

Pronunciation, gender: mul-ti-FOR-mis, masculine

Type strain: ATCC 25196; C-71; DSM 101674

See detailed strain information at

Conduct genome-based taxonomy at

16S rRNA gene: AB070984 Analyse FASTA

Effective publication: Watson SW, Graham LB, Remsen CC, Valois FW. A lobular, ammonia-oxidizing bacterium, Nitrosolobus multiformis nov.gen.nov.sp. Arch Mikrobiol 1971; 76:183-203.

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: Nitrosospira multiformis (Watson et al. 1971) Head et al. 1995

Risk group: 1

• Synonyms:

  • Name	Kind
    Nitrosospira multiformis (Watson et al. 1971) Head et al. 1995	homotypic synonym, validly published under the ICNP

• Emendations:
  • Watson 1971 Watson SW. Taxonomic considerations of the family Nitrobacteriaceae Buchanan. Requests for opinions. International Journal of Systematic Bacteriology 1971; 21:254-270.
    Notes:
    • 🧍 As of 2022-11-26 this emendation was not yet included in an IJSEM List of Changes in Taxonomic Opinion.

• Notes:
  • 🥇 Nomenclatural type of the genus Nitrosolobus Watson et al. 1971 (Approved Lists 1980). Publication: Watson SW, Graham LB, Remsen CC, Valois FW. A lobular, ammonia-oxidizing bacterium, Nitrosolobus multiformis nov.gen.nov.sp. Arch Mikrobiol 1971; 76:183-203.
  • ❗ Nitrosolobus multiformis 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 Nitrosolobus.
  • 😷 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 9 times in PubMed until 2025-06-04.

Parent taxon: Nitrosolobus Watson et al. 1971 (Approved Lists 1980)

Assigned by: Watson SW, Graham LB, Remsen CC, Valois FW. A lobular, ammonia-oxidizing bacterium, Nitrosolobus multiformis nov.gen.nov.sp. Arch Mikrobiol 1971; 76:183-203.

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Record number: 784481