Name: Flexithrix dorotheae Lewin 1970 (Approved Lists 1980)

Category: Species

Proposed as: sp. nov.

Etymology: do.ro.the’ae. N.L. gen. fem. n. dorotheae, of Dorothy, named after Mrs. Dorothy White, a technical assistant

Gender: feminine

Type strain: ATCC 23163; DSM 6795; IFO 15987; LMG 8379; NBRC 15987

See detailed strain information at

Conduct genome-based taxonomy at

16S rRNA gene: AB078077 Analyse FASTA

Effective publication: Lewin RA. Flexithrix dorotheae gen. et sp. nov. (Flexibacterales); and suggestions for reclassifying sheathed bacteria. Can J Microbiol 1970; 16:511-515.

IJSEM list: Skerman VBD, McGowan V, Sneath PHA. Approved lists of bacterial names. Int J Syst Bacteriol 1980; 30:225-420.

Nomenclatural status: validly published under the ICNP

Taxonomic status: correct name

Risk group: 1

• Emendations:
  • Hosoya and Yokota 2007 Hosoya S, Yokota A. Reclassification of Flexibacter aggregans (Lewin 1969) Leadbetter 1974 as a later heterotypic synonym of Flexithrix dorotheae Lewin 1970. Int J Syst Evol Microbiol 2007; 57:1086-1088. Euzeby JP. Notification list. Notification that new names and new combinations have appeared in volume 57, part 5 of the IJSEM. Int J Syst Evol Microbiol 2007; 57:1675-1676.
    Notes:
    • 🫂 Emendation accompanied by a proposal regarding the synonymy of the species.

• Notes:
  • 🥇 Nomenclatural type of the genus Flexithrix Lewin 1970 (Approved Lists 1980). Publication: Lewin RA. Flexithrix dorotheae gen. et sp. nov. (Flexibacterales); and suggestions for reclassifying sheathed bacteria. Can J Microbiol 1970; 16:511-515.
  • ⏰ According to Hosoya and Yokota (2007), this species is an earlier heterotypic synonym of "Microscilla aggregans" Lewin 1969 but this is in conflict with the rules of the International Code of Nomenclature of Prokaryotes. Publication: Hosoya S, Yokota A. Reclassification of Flexibacter aggregans (Lewin 1969) Leadbetter 1974 as a later heterotypic synonym of Flexithrix dorotheae Lewin 1970. Int J Syst Evol Microbiol 2007; 57:1086-1088.
  • ⏰ According to Hosoya and Yokota (2007), this species is an earlier heterotypic synonym of Flexibacter aggregans (Lewin 1969) Leadbetter 1974 (Approved Lists 1980) but this is in conflict with the rules of the International Code of Nomenclature of Prokaryotes. Publication: Hosoya S, Yokota A. Reclassification of Flexibacter aggregans (Lewin 1969) Leadbetter 1974 as a later heterotypic synonym of Flexithrix dorotheae Lewin 1970. Int J Syst Evol Microbiol 2007; 57:1086-1088.
  • 😷 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. — 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 6 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: 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.

Parent taxon: Flexithrix Lewin 1970 (Approved Lists 1980)

Assigned by: Lewin RA. Flexithrix dorotheae gen. et sp. nov. (Flexibacterales); and suggestions for reclassifying sheathed bacteria. Can J Microbiol 1970; 16:511-515.

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Record number: 776304