Name: Acidianus infernus Segerer et al. 1986

Category: Species

Proposed as: sp. nov.

Etymology: in.fer’nus. L. masc. adj. infernus, belonging to the Lower Regions, belonging to Hades, referring to the locus typicus at the Solfatara Crater, where Dante placed the gate to hell in his Divina Commedia (can be noun or adjective)

Gender: masculine

Type strain: DSM 3191; IFO 15270; JCM 8955; NBRC 15270; So4a

See detailed strain information at

Conduct genome-based taxonomy at

16S rRNA gene: D85505 Analyse FASTA

Valid publication: Segerer A, Neuner AM, Kristjansson JK, Stetter KO. Acidianus infernus gen. nov., sp. nov., and Acidianus brierleyi comb. nov.: facultatively aerobic, extremely acidophilic thermophilic sulfur-metabolizing archaebacteria. Int. J. Syst. Bacteriol. 1986; 36:559-564.

Nomenclatural status: validly published under the ICNP

Taxonomic status: correct name

Risk group: 1

• Notes:
  • 🥇 Nomenclatural type of the genus Acidianus Segerer et al. 1986. Publication: Segerer A, Neuner AM, Kristjansson JK, Stetter KO. Acidianus infernus gen. nov., sp. nov., and Acidianus brierleyi comb. nov.: facultatively aerobic, extremely acidophilic thermophilic sulfur-metabolizing archaebacteria. Int. J. Syst. Bacteriol. 1986; 36:559-564.
  • 😷 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 13 times in PubMed until 2025-06-04.

Parent taxon: Acidianus Segerer et al. 1986

Assigned by: Segerer A, Neuner AM, Kristjansson JK, Stetter KO. Acidianus infernus gen. nov., sp. nov., and Acidianus brierleyi comb. nov.: facultatively aerobic, extremely acidophilic thermophilic sulfur-metabolizing archaebacteria. Int. J. Syst. Bacteriol. 1986; 36:559-564.

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Record number: 772574