Name: Palaeococcus helgesonii Amend et al. 2006

Category: Species

Proposed as: sp. nov.

Etymology: hel.ge.so’ni.i. N.L. gen. masc. n. helgesonii, in honor of Harold C. Helgeson, aqueous geochemist and biogeochemist, who first recognized the importance of studying thermophiles in their geochemical context

Gender: masculine

Type strain: DSM 15127; JCM 13384; PI1

See detailed strain information at

16S rRNA gene: AY134472 Analyse FASTA

Effective publication: Amend JP, Meyer-Dombard DR, Sheth SN, Zolotova N, Amend AC. Palaeococcus helgesonii sp. nov., a facultatively anaerobic, hyperthermophilic archaeon from a geothermal well on Vulcano Island, Italy. Arch Microbiol 2003; 179:394-401.

IJSEM list: Euzeby JP. Validation list no. 107. List of new names and new combinations previously effectively, but not validly, published. Int J Syst Evol Microbiol 2006; 56:1-6.

Nomenclatural status: validly published under the ICNP

Taxonomic status: correct name

Risk group: 1

• Notes:
  • 😷 The risk group for Germany has been imported on 2023-10-29. The full classification is: risk group = 1.
  • 🎓 Name mentioned 1 time in PubMed until 2024-03-27.
  • 🧍 The culture collection accession number JCM 13384 has been provided on request for validation. Publication: Euzeby JP. Validation list no. 107. List of new names and new combinations previously effectively, but not validly, published. Int J Syst Evol Microbiol 2006; 56:1-6.

Parent taxon: Palaeococcus Takai et al. 2000

Assigned by: Amend JP, Meyer-Dombard DR, Sheth SN, Zolotova N, Amend AC. Palaeococcus helgesonii sp. nov., a facultatively anaerobic, hyperthermophilic archaeon from a geothermal well on Vulcano Island, Italy. Arch Microbiol 2003; 179:394-401.

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Record number: 779110