Name: Psychromonas hadalis Nogi et al. 2007

Category: Species

Proposed as: sp. nov.

Etymology: ha.da’lis. N.L. fem. adj. hadalis, hadal of or relating to the deepest regions of the ocean (from Greek Haides)

Pronunciation, gender: ha-DA-lis, feminine

Type strain: ATCC BAA-638; JCM 11830; K41G

See detailed strain information at

Conduct genome-based taxonomy at

16S rRNA gene: AB094413 Analyse FASTA

Valid publication: Nogi Y, Hosoya S, Kato C, Horikoshi K. Psychromonas hadalis sp. nov., a novel piezophilic bacterium isolated from the bottom of the Japan Trench. Int J Syst Evol Microbiol 2007; 57:1360-1364.

IJSEM list: Euzeby JP. Notification list. Notification that new names and new combinations have appeared in volume 57, part 6 of the IJSEM. Int J Syst Evol Microbiol 2007; 57:1935-1936.

Nomenclatural status: validly published under the ICNP

Taxonomic status: correct name

Risk group: 1

• Notes:
  • 😢 The terminology used by the authors is in line with many other taxonomic studies and does not negatively affect their main results; some improvements may nevertheless be possible. The term "phylogenetic definition" is not recommended. Whether taxa can have "members" is debatable. See the LPSN phylogeny page for details. Publication: Göker M. What can genome analysis offer for bacteria? In: Bridge P, Smith D, Stackebrandt E (eds), Trends in the systematics of bacteria and fungi, CAB International, Wallingford, 2021, p. 255-281.
  • 🧬 The phylogenomic assignment score of this taxon is 0.18927 (N = 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 1 time in PubMed until 2025-06-04.
  • 🧍 The genome of the type strain was sequenced as part of the GEBA (Genomic Encyclopedia of Bacteria and Archaea) project. Publication: Mukherjee S, Seshadri R, Varghese NJ, Eloe-Fadrosh EA, Meier-Kolthoff JP, Goker M, Coates RC, Hadjithomas M, Pavlopoulos GA, Paez-Espino D, et al. 1,003 reference genomes of bacterial and archaeal isolates expand coverage of the tree of life. Nat Biotechnol 2017; 35:676-683.

Parent taxon: Psychromonas Mountfort et al. 1998

Assigned by: Nogi Y, Hosoya S, Kato C, Horikoshi K. Psychromonas hadalis sp. nov., a novel piezophilic bacterium isolated from the bottom of the Japan Trench. Int J Syst Evol Microbiol 2007; 57:1360-1364.

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Record number: 786401