Name: Pyrodictium abyssi Pley and Stetter 1991

Category: Species

Proposed as: sp. nov.

Etymology: a.bys’si. L. gen. masc./fem. n. abyssi, of an abyss, living at great depth within the oceans

Gender: neuter

Type strain: ATCC 49828; DSM 6158; JCM 9394; NBRC 100439; Strain AV2

See detailed strain information at

Conduct genome-based taxonomy at

16S rRNA gene: X99559 Analyse FASTA

Effective publication: Pley U, Schipka J, Gambacorta A, Jannasch HW, Fricke H, Rachel R, Stetter KO. Pyrodictium abyssi sp. nov. represents a novel heterotrophic marine archaeal hyperthermophile growing at 110°C. Syst. Appl. Microbiol. 1991; 14:245-253.

IJSEM list: Anonymous. Validation list no. 39. Validation of publication of new names and new combinations previously effectively published outside the IJSB. Int J Syst Bacteriol 1991; 41:580-581.

Nomenclatural status: validly published under the ICNP

Taxonomic status: correct name

Risk group: 1

• Notes:
  • ✏ The authority of the taxon name (Pley and Stetter) deliberately differs from the authors of the publication (Pley et al.).
  • 😷 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.
  • 🎓 Name mentioned 10 times in PubMed until 2024-03-27.
  • 🧍 Complete authorship reads: Pley and Stetter 1991 in Pley, Schipka, Gambacorta, Jannasch, Fricke, Rachel and Stetter 1991.
  • 🧍 The name Pyrodictium abyssi must be attributed to Pley and Stetter 1991 (in Pley, Schipka, Gambacorta, Jannasch, Fricke, Rachel and Stetter 1991) not to Pley et al. 1991 as cited in Validation List no. 39. Publication: Stetter KO. Genus I. Pyrodictium Stetter, König and Stackebrandt 1984, 270VP, emend. Pley and Stetter in Pley, Schipka, Gambacorta, Jannasch, Fricke, Rachel and Stetter 1991, 251 (Effective publication: Stetter, König and Stackebrandt 1983, 549). In: Boone DR, Castenholz RW, Garrity GM (eds), Bergey's Manual of Systematic Bacteriology, second edition, vol. 1 (The Archaea and the deeply branching and phototrophic Bacteria), Springer-Verlag, New York, 2001, p. 192-195.

Parent taxon: Pyrodictium Stetter et al. 1984

Assigned by: Pley U, Schipka J, Gambacorta A, Jannasch HW, Fricke H, Rachel R, Stetter KO. Pyrodictium abyssi sp. nov. represents a novel heterotrophic marine archaeal hyperthermophile growing at 110°C. Syst. Appl. Microbiol. 1991; 14:245-253.

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Record number: 780282