Name: Cytophaga xylanolytica Haack and Breznak 1993

Category: Species

Proposed as: sp. nov.

Etymology: xy.lan.o.ly’ti.ca. Chem. neut. n. xylan, xylan, a xylose-containing heteropolysaccharide in plant cell walls; Gr. inf. v. lyein, to loosen, dissolve; N.L. fem. adj. lytica, dissolving; N.L. fem. adj. xylanolytica, xylan-dissolving

Gender: feminine

Type strain: ATCC 51429; DSM 6779; XM3

See detailed strain information at

Conduct genome-based taxonomy at

16S rRNA gene: FR733683 Analyse FASTA

Effective publication: Haack SK, Breznak JA. Cytophaga xylanolytica sp. nov., a xylan-degrading, anaerobic gliding bacterium. Arch. Microbiol. 1993; 159:6-15.

IJSEM list: Anonymous. Validation list no. 46. Validation of publication of new names and new combinations previously effectively published outside the IJSB. Int J Syst Bacteriol 1993; 43:624-625.

Nomenclatural status: validly published under the ICNP

Taxonomic status: synonym

Correct name: Breznakibacter xylanolyticus (Haack and Breznak 1993) García-López et al. 2020

Risk group: 1

• Synonyms:

  • Name	Kind
    Breznakibacter xylanolyticus (Haack and Breznak 1993) García-López et al. 2020	homotypic synonym, validly published under the ICNP

• Notes:
  • ❗ Cytophaga xylanolytica is the correct name instead if this species is regarded as a separate species (i.e., if its nomenclatural type is not assigned to another species whose name is validly published, legitimate and not rejected and has priority) within a separate genus Cytophaga.
  • 😷 The risk group for Canada has been imported on 2024-02-27. The full classification is: risk group = 1, note = "Security sensitive biological agent: No - Terrestrial animal pathogen under Canadian Food Inspection Agency authority: No". — The risk group for Swiss Confederation has been imported on 2024-02-01. The full classification is: risk group = 1. — The risk group for Germany has been imported on 2023-10-29. The full classification is: risk group = 1.
  • 🎓 Name mentioned 4 times in PubMed until 2024-03-27.
  • 🧍 The genome of the type strain was sequenced as part of the GEBA (Genomic Encyclopedia of Bacteria and Archaea) project. 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.
  • 🧍 Yarza et al. (2013) expected for accession FR733683, originating from the alleged type-strain deposit DSM 6779, an affiliation with Cytophagaceae (Sphingobacteria) but observed an affiliation with a deep branch in Bacteroidales and 80.3% similarity against Cytophaga hutchinsonii. Publication: Yarza P, Sproer C, Swiderski J, Mrotzek N, Spring S, Tindall BJ, Gronow S, Pukall R, Klenk HP, Lang E, et al. Sequencing orphan species initiative (SOS): Filling the gaps in the 16S rRNA gene sequence database for all species with validly published names. Syst Appl Microbiol 2013; 36:69-73.
  • 🧍 The 16S rRNA gene sequence of the type strain shows an unexpected affiliation with a deep branch in Bacteroidales (80.3% similarity against Cytophaga hutchinsonii). Publication: Yarza P, Sproer C, Swiderski J, Mrotzek N, Spring S, Tindall BJ, Gronow S, Pukall R, Klenk HP, Lang E, et al. Sequencing orphan species initiative (SOS): Filling the gaps in the 16S rRNA gene sequence database for all species with validly published names. Syst Appl Microbiol 2013; 36:69-73.

Parent taxon: Cytophaga Winogradsky 1929 (Approved Lists 1980)

Assigned by: Haack SK, Breznak JA. Cytophaga xylanolytica sp. nov., a xylan-degrading, anaerobic gliding bacterium. Arch. Microbiol. 1993; 159:6-15.

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Record number: 775408