Name: Leptothrix cholodnii Mulder and van Veen 1963 (Approved Lists 1980)

Category: Species

Proposed as: sp. nov.

Etymology: cho.lod’ni.i. N.L. gen. masc. n. cholodnii, of Cholodny, named for N. Cholodny, a Russian bacteriologist

Pronunciation, gender: k^ho-LOD-ni-i, feminine

Type strain: LVMW 99

Effective publication: Mulder EG, van Veen WL. Investigations on the Sphaerotilus-Leptothrix group. Antonie van Leeuwenhoek Journal of Microbiology and Serology 1963; 29:121-153.

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

• Synonyms:

  • Name	Kind
    "Sphaerotilus cholodnii" (Mulder and van Veen 1963) Smolyakov et al. 2025	homotypic synonym, not validly published

• Emendations:
  • Spring et al. 1996 Spring S, Kämpfer P, Ludwig W, Schleifer KH. Polyphasic characterization of the genus Leptothrix: new descriptions of Leptothrix mobilis sp. nov. and Leptothrix discophora sp. nov. nom. rev. and emended description of Leptothrix cholodnii emend. Syst. Appl. Microbiol. 1996; 19:634-643. 🇩🇪
    Notes:
    • 🧍 As of 2019-04-01 this emendation was not yet included in an IJSEM List of Changes in Taxonomic Opinion.
    • 🧍 The type strain LVMW 99 is lost, so Spring et al. 1997 propose to use the strain LMG 7171 as reference strain, until a neotype will be designated.

• Notes:
  • 😩 Deposits incorrectly indicated in some sources as representing the type strain of this taxon: ATCC 51168; LMG 7171; SP 6.
  • 😷 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 17 times in PubMed until 2025-06-04.
  • 🧍 According to Yarza et al. (2013), an "orphan species with designated type strains that were either not deposited in culture collections or whose type strain is currently not available from a recognized culture collection". 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. 🇩🇪
  • 🧍 According to Dr. Kuever, the strain LVMW 99 is lost. — Kuever J. Personal communication, 2010-02-11.

Parent taxon: Leptothrix Kützing 1843 (Approved Lists 1980)

Assigned by: Mulder EG, van Veen WL. Investigations on the Sphaerotilus-Leptothrix group. Antonie van Leeuwenhoek Journal of Microbiology and Serology 1963; 29:121-153.

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Record number: 777515