Genus Cognatundibacterium

Name: Cognatundibacterium Lu et al. 2026

Category, proposed as: genus, gen. nov.

Etymology: Co.gnat.un.di.bac.te’ri.um. L. masc. adj. cognatus, relative, related, kindred; N.L. neut. n. Undibacterium, a bacteria generic name; N.L. neut. n. Cognatundibacterium, related to Undibacterium

Gender, pronunciation (Latin): neuter (stem: Cognatundibacteri-), ko-n͡gnat-un-di-bak-TE-ri-um

Type species: Cognatundibacterium oligocarboniphilum (Eder et al. 2011) Lu et al. 2026

Conduct genome-based taxonomy of genus at TYGS

16S rRNA gene: Analyse FASTA

Effective publication: Lu HB, Kong LY, Chen L, Chen GJ, Wang JJ. Isolation of diverse Undibacterium-related strains from alpine lakes and re-examining the taxonomic status of this genus. Syst Appl Microbiol 2025; 48:126661. 🇨🇳

IJSEM list: Oren A, Göker M. Validation list no. 227. List of new names and new combinations previously effectively, but not validly, published. Int J Syst Evol Microbiol 2026; 76:6989.

Nomenclatural status: validly published under the ICNP

Taxonomic status: correct name

• Notes:
  • 🚋 The type species of this genus has alternatively been placed in the genus Undibacterium Kämpfer et al. 2007. Publication: Eder W, Wanner G, Ludwig W, Busse HJ, Ziemke-Kageler F, Lang E. Description of Undibacterium oligocarboniphilum sp. nov., isolated from purified water, and Undibacterium pigrum strain CCUG 49012 as the type strain of Undibacterium parvum sp. nov., and emended descriptions of the genus Undibacterium and the species Undibacterium pigrum. Int J Syst Evol Microbiol 2011; 61:384-391. 🇺🇸
  • 🧬 The phylogenomic assignment score of this taxon is 0.07577 (N = 3).
  • 🎰 The BRCs most frequently used for deposits in this group are: GDMCC: 5; KCTC: 5; KACC: 4; DSM: 2; LMG: 1; NBRC: 1; BCRC: 1; CGMCC: 1; CCUG: 1; CCTCC: 1.

Subdivision:

Number of child taxa with a validly published and correct name: 10
Number of child taxa with a validly published name, including synonyms: 10
Total number of child taxa: 10

• Child taxa:

  • Name	Nomenclatural status	Taxonomic status
    Cognatundibacterium aquatile (Du et al. 2015) Lu et al. 2026	validly published under the ICNP	correct name
    Cognatundibacterium crateris (Phurbu et al. 2021) Lu et al. 2026	validly published under the ICNP	correct name
    Cognatundibacterium curvum (Lu et al. 2021) Lu et al. 2026	validly published under the ICNP	correct name
    Cognatundibacterium griseum (Lu et al. 2021) Lu et al. 2026	validly published under the ICNP	correct name
    Cognatundibacterium jejuense (Kim et al. 2014) Lu et al. 2026	validly published under the ICNP	correct name
    Cognatundibacterium luofuense (Lu et al. 2021) Lu et al. 2026	validly published under the ICNP	correct name
    Cognatundibacterium oligocarboniphilum (Eder et al. 2011) Lu et al. 2026	validly published under the ICNP	correct name
    Cognatundibacterium rivi (Lu et al. 2021) Lu et al. 2026	validly published under the ICNP	correct name
    Cognatundibacterium rugosum (Lu et al. 2021) Lu et al. 2026	validly published under the ICNP	correct name
    Cognatundibacterium squillarum (Sheu et al. 2014) Lu et al. 2026	validly published under the ICNP	correct name

Parent taxon: Oxalobacteraceae Garrity et al. 2006

Assigned by: Lu HB, Kong LY, Chen L, Chen GJ, Wang JJ. Isolation of diverse Undibacterium-related strains from alpine lakes and re-examining the taxonomic status of this genus. Syst Appl Microbiol 2025; 48:126661. 🇨🇳

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Record number: 70240