Name: Thermoproteus neutrophilus Stetter and Zillig 1989

Category: Species

Proposed as: sp. nov.

Etymology: neu.tro’phi.lus. L. adj. neut. -tra -trum, neither the one nor the other, neutral; N.L. masc. adj. suff. -philus, friend, loving; from Gr. masc. adj. philos, on; N.L. masc. adj. neutrophilus, preferring neutral pH.

Gender: masculine

Type strain: DSM 2338; JCM 9278; NBRC 100436; V24Sta

See detailed strain information at

Conduct genome-based taxonomy at

16S rRNA gene: AB009618 Analyse FASTA

Effective publication: Zillig W. Genus I. Thermoproteus Zillig and Stetter 1982, 267”' (effective publication Zillig and Stetter in Zillig, Stetter, Shafer, Janekovic, Wunderl, Holz and Palm 1981,225). In: Staley JT, Bryant MP, Pfennig N, Holt JG (eds), Bergey's manual of systematic bacteriology, vol. 3., The Williams & Wilkins Co., Baltimore, 1989, p. 2241.

IJSEM list: Anonymous. Validation list no. 31. Validation of publication of new names and new combinations previously effectively published outside the IJSB. Int J Syst Bacteriol 1989; 39:495-497.

Nomenclatural status: validly published under the ICNP

Taxonomic status: synonym

Correct name: Pyrobaculum neutrophilum (Stetter and Zillig 1989) Chan et al. 2013

Risk group: 1

• Synonyms:

  • Name	Kind
    Pyrobaculum neutrophilum (Stetter and Zillig 1989) Chan et al. 2013	homotypic synonym, validly published under the ICNP

• Notes:
  • ❗ Thermoproteus neutrophilus 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 Thermoproteus.
  • 😷 The risk group for Canada has been imported on 2024-02-27. The full classification is: risk group = 1, note = "Security sensitive biological agent: No - Terrestrial animal pathogen under Canadian Food Inspection Agency authority: No". — 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 19 times in PubMed until 2025-06-04.
  • 🧍 In Validation List no. 31, Thermoproteus neutrophilus Stetter and Zillig 1989 is erroneously cited as Thermoproteus neutrophilus Zillig 1989. Publication: Anonymous. Validation list no. 31. Validation of publication of new names and new combinations previously effectively published outside the IJSB. Int J Syst Bacteriol 1989; 39:495-497.

Parent taxon: Thermoproteus Zillig and Stetter 1982

Assigned by: Zillig W. Genus I. Thermoproteus Zillig and Stetter 1982, 267”' (effective publication Zillig and Stetter in Zillig, Stetter, Shafer, Janekovic, Wunderl, Holz and Palm 1981,225). In: Staley JT, Bryant MP, Pfennig N, Holt JG (eds), Bergey's manual of systematic bacteriology, vol. 3., The Williams & Wilkins Co., Baltimore, 1989, p. 2241.

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Record number: 782626