Name: Psychroserpens mesophilus Kwon et al. 2006

Category: Species

Proposed as: sp. nov.

Etymology: me.so’phi.lus. Gr. masc. adj. mesos, middle; N.L. masc. adj. suff. -philus, loving; N.L. masc. adj. mesophilus, middle (temperature)-loving, mesophilic

Pronunciation, gender: me-SO-p^hi-lus, masculine

Type strain: JCM 13413; KCCM 42261; KOPRI 13649

See detailed strain information at

Conduct genome-based taxonomy at

16S rRNA gene: DQ001321 Analyse FASTA

Valid publication: Kwon KK, Lee SJ, Park JH, Ahn TY, Lee HK. Psychroserpens mesophilus sp. nov., a mesophilic marine bacterium belonging to the family Flavobacteriaceae isolated from a young biofilm. Int J Syst Evol Microbiol 2006; 56:1055-1058.

IJSEM list: Euzeby JP. Notification list. Notification that new names and new combinations have appeared in volume 56, part 5 of the IJSEM. Int J Syst Evol Microbiol 2006; 56:1719-1720.

Nomenclatural status: validly published under the ICNP

Taxonomic status: correct name

Risk group: 1

• Emendations:
  • García-López et al. 2019 Garcia-Lopez M, Meier-Kolthoff JP, Tindall BJ, Gronow S, Woyke T, Kyrpides NC, Hahnke RL, Goker M. Analysis of 1,000 Type-Strain Genomes Improves Taxonomic Classification of Bacteroidetes. Front Microbiol 2019; 10:2083. Oren A, Garrity GM. List of changes in taxonomic opinion no. 32. Notification of changes in taxonomic opinion previously published outside the IJSEM. Int J Syst Evol Microbiol 2020; 70:4061-4090.

• Notes:
  • 😷 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 5 times in PubMed until 2025-06-04.
  • 🧍 According to Ludwig et al. (2021), this "species affiliates away from its type species and may be reclassified as a new genus together with P. jangbogonensis". Publication: Ludwig W, Viver T, Westram R, Francisco Gago J, Bustos-Caparros E, Knittel K, Amann R, Rossello-Mora R. Release LTP_12_2020, featuring a new ARB alignment and improved 16S rRNA tree for prokaryotic type strains. Syst Appl Microbiol 2021; 44:126218.

Parent taxon: Psychroserpens Bowman et al. 1997

Assigned by: Kwon KK, Lee SJ, Park JH, Ahn TY, Lee HK. Psychroserpens mesophilus sp. nov., a mesophilic marine bacterium belonging to the family Flavobacteriaceae isolated from a young biofilm. Int J Syst Evol Microbiol 2006; 56:1055-1058.

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Record number: 784751