Name: Polaribacter irgensii Gosink et al. 1998

Category: Species

Proposed as: sp. nov.

Etymology: ir.gen’si.i. N.L. gen. masc. n. irgensii, in honour of Roar L. Irgens, American microbiologist and polar researcher who first observed gas vacuolate polar marine bacteria

Gender: masculine

Type strain: 23-P; ATCC 700398; CIP 106478

See detailed strain information at

Conduct genome-based taxonomy at

16S rRNA gene: M61002 Analyse FASTA

Valid publication: Gosink JJ, Woese CR, Staley JT. Polaribacter gen. nov., with three new species, P. irgensii sp. nov., P. franzmannii sp. nov. and P. filamentus sp. nov., gas vacuolate polar marine bacteria of the Cytophaga-Flavobacterium-Bacteroides group and reclassification of 'Flectobacillus glomeratus' as Polaribacter glomeratus comb. nov. Int J Syst Bacteriol 1998; 48:223-235.

IJSEM list: Anonymous. Notification list. Notification that new names and new combinations have appeared in volume 48, part 1 of the IJSB. Int J Syst Bacteriol 1998; 48:629.

Nomenclatural status: validly published under the ICNP

Taxonomic status: correct name

Risk group: 1

• Emendations:
  • Kim et al. 2013 Kim BC, Oh HW, Kim H, Park DS, Hong SG, Lee HK, Bae KS. Polaribacter sejongensis sp. nov., isolated from Antarctic soil, and emended descriptions of the genus Polaribacter, Polaribacter butkevichii and Polaribacter irgensii. Int J Syst Evol Microbiol 2013; 63:4000-4005. Oren A, Garrity GM. Notification list. Notification that new names and new combinations have appeared in volume 63, part 11 of the IJSEM. Int J Syst Evol Microbiol 2014; 64:313-315.
  • Hahnke et al. 2016 Hahnke RL, Meier-Kolthoff JP, Garcia-Lopez M, Mukherjee S, Huntemann M, Ivanova NN, Woyke T, Kyrpides NC, Klenk HP, Goker M. Genome-Based Taxonomic Classification of Bacteroidetes. Front Microbiol 2016; 7:2003. Oren A, Garrity GM. List of changes in taxonomic opinion no. 26. Notification of changes in taxonomic opinion previously published outside the IJSEM. Int J Syst Evol Microbiol 2017; 67:2081-2086.

• Notes:
  • The phylogenomic assignment score of this taxon is 0.04823 (N = 81).
  • The phylogenetic position of this species was determined in a genome-scale analysis by García-López et al. (2019). Publication: 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.

Parent taxon: Polaribacter Gosink et al. 1998

Assigned by: Gosink JJ, Woese CR, Staley JT. Polaribacter gen. nov., with three new species, P. irgensii sp. nov., P. franzmannii sp. nov. and P. filamentus sp. nov., gas vacuolate polar marine bacteria of the Cytophaga-Flavobacterium-Bacteroides group and reclassification of 'Flectobacillus glomeratus' as Polaribacter glomeratus comb. nov. Int J Syst Bacteriol 1998; 48:223-235.

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Record number: 784650