Name: Pseudocolwellia Liu et al. 2021

Category: Genus

Proposed as: gen. nov.

Etymology: Pseu.do.col.wel’li.a. Gr. neut. adj. pseudes, false; N.L. fem. n. Colwellia, a bacteria generic name; N.L. fem. n. Pseudocolwellia, false Colwellia

Gender, pronunciation (Latin): feminine (stem: Pseudocolwelli-), pse͡u-do-kol-WEL-li-a

Type species: Pseudocolwellia agarivorans (Xu et al. 2017) Liu et al. 2021

Conduct genome-based taxonomy of genus at TYGS

16S rRNA gene: Analyse FASTA

Effective publication: Liu A, Zhang YJ, Cheng P, Peng YJ, Blom J, Xue QJ. Whole genome analysis calls for a taxonomic rearrangement of the genus Colwellia. Antonie Van Leeuwenhoek 2020; 113:919-931. 🇨🇳

IJSEM list: Oren A, Garrity GM. Validation list no. 199. List of new names and new combinations previously effectively, but not validly, published. Int J Syst Evol Microbiol 2021; 71:4773.

Nomenclatural status: validly published under the ICNP

Taxonomic status: correct name

• Emendations:
  • Kim et al. 2026 Kim MK, Oh SJ, Lee BM, Lee J, Hwang CY. Genomic and phenotypic insights into Pseudocolwellia antarctica sp. nov., a novel psychrotolerant bacterium with symbiotic potential from Antarctic zooplankton. Sci Rep 2026; 0:0. 🇰🇷
    Notes:
    • 🧍 As of 2026-06-10 this emendation was not yet included in an IJSEM List of Changes in Taxonomic Opinion.

• Notes:
  • 🚋 The type species of this genus has alternatively been placed in the genus Colwellia Deming et al. 1988. Publication: Xu ZX, Zhang HX, Han JR, Dunlap CA, Rooney AP, Mu DS, Du ZJ. Colwellia agarivorans sp. nov., an agar-digesting marine bacterium isolated from coastal seawater. Int J Syst Evol Microbiol 2017; 67:1969-1974. 🇨🇳
  • 🎰 The BRCs most frequently used for deposits in this group are: MCCC: 1; KCTC: 1; JCM: 1; KCCM: 1.
  • 🧍 Colwellia was demonstrated in the analysis be Liu et al. (2020) to not be monophyletic. However, this was only caused by the placement of Litorilituus, which made Colwellia paraphyletic. This genus could have been included in Colwellia, which would have been the more conservative solution than proposing two new genera. Publication: Parte AC, Sarda Carbasse J, Meier-Kolthoff JP, Reimer LC, Goker M. List of Prokaryotic names with Standing in Nomenclature (LPSN) moves to the DSMZ. Int J Syst Evol Microbiol 2020; 70:5607-5612. 🇩🇪

Subdivision:

Number of child taxa with a validly published and correct name: 1
Number of child taxa with a validly published name, including synonyms: 1
Total number of child taxa: 2

• Child taxa:

  • Name	Nomenclatural status	Taxonomic status
    Pseudocolwellia agarivorans (Xu et al. 2017) Liu et al. 2021	validly published under the ICNP	correct name
    "Pseudocolwellia antarctica" Kim et al. 2026	not validly published	preferred name

Parent taxon: Colwelliaceae Ivanova et al. 2004

Assigned by: Liu A, Zhang YJ, Cheng P, Peng YJ, Blom J, Xue QJ. Whole genome analysis calls for a taxonomic rearrangement of the genus Colwellia. Antonie Van Leeuwenhoek 2020; 113:919-931. 🇨🇳

Linking: To permanently link to this page, use https://doi.org/10.83108/rn.19589Copy to clipboardLink copied to clipboard

Record number: 19589

• Previous versions:

  • Version	Date	JSON
    1	2026-03-31