Species Streptomyces libani

Name: Streptomyces libani Baldacci and Grein 1966 (Approved Lists 1980)

Category: Species

Proposed as: sp. nov.

Etymology: li’ba.ni. L. gen. masc. n. libani, of Lebanon, the source of the soil from which the organism was isolated

Pronunciation (Latin), gender: strep-TO-my-kes LI-ba-ni, masculine

Type strain: ATCC 23732; CBS 753.72; DSM 40555; DSM 41227; IFO 13452; JCM 4322; JCM 4781; KCTC 9113; NBRC 13452; NCAIM B.01474; NCIB 11012; NCIMB 11012; NRRL B-3446; NRRL ISP-5555; RIA 1413; VKM Ac-1905

See detailed strain information at

Conduct genome-based taxonomy at

16S rRNA gene: AB184414 Analyse FASTA

Effective publication: Baldacci E, Grein A. Streptomyces avellaneus and Streptomyces libani: two new species characterized by a hazel-nut brown (avellaneus) aerial mycelium. Giornale di Microbiologia 1966; 14:185-198.

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: synonym (and not recommended for medical use)

Correct name: Streptomyces nigrescens (Sveshnikova 1957) Pridham et al. 1958 (Approved Lists 1980)

Risk group: 1

Synonyms:

Name	Kind
Streptomyces ruanii Kumar and Goodfellow 2008	heterotypic synonym, validly published under the ICNP, illegitimate name
"Actinomyces nigrescens" Sveshnikova 1957	heterotypic synonym, not validly published, basonym of name in Approved Lists
Streptomyces nigrescens (Sveshnikova 1957) Pridham et al. 1958 (Approved Lists 1980)	heterotypic synonym, validly published under the ICNP

Notes:
- ⏲ According to Shu et al. (2025), this species is a later heterotypic synonym of "Actinomyces nigrescens" Sveshnikova 1957. Publication: Shu W, Ruckert-Reed C, Gromyko O, Tistechok S, Kalinowski J, Luzhetskyy A, Wittmann C. Description of Streptomyces explomaris sp. nov., isolated from the coastal soil rhizosphere of Juniperus excelsa and reclassification of Streptomyces libani as a later heterotypic synonym of Streptomyces nigrescens. Int J Syst Evol Microbiol 2025; 75:6711. 🇩🇪
- ⏲ According to Shu et al. (2025), this species is a later heterotypic synonym of Streptomyces nigrescens (Sveshnikova 1957) Pridham et al. 1958 (Approved Lists 1980). Publication: Shu W, Ruckert-Reed C, Gromyko O, Tistechok S, Kalinowski J, Luzhetskyy A, Wittmann C. Description of Streptomyces explomaris sp. nov., isolated from the coastal soil rhizosphere of Juniperus excelsa and reclassification of Streptomyces libani as a later heterotypic synonym of Streptomyces nigrescens. Int J Syst Evol Microbiol 2025; 75:6711. 🇩🇪
- ⏲ According to Shu et al. (2025), this species is a later heterotypic synonym of Streptomyces ruanii Kumar and Goodfellow 2008. Publication: Shu W, Ruckert-Reed C, Gromyko O, Tistechok S, Kalinowski J, Luzhetskyy A, Wittmann C. Description of Streptomyces explomaris sp. nov., isolated from the coastal soil rhizosphere of Juniperus excelsa and reclassification of Streptomyces libani as a later heterotypic synonym of Streptomyces nigrescens. Int J Syst Evol Microbiol 2025; 75:6711. 🇩🇪
- 🏢 Synonymy of this taxon was mentioned in an IJSEM list. Publication: Oren A, Göker M. Notification list. Notification that new names and new combinations have appeared in volume 75, part 5 of the IJSEM. Int J Syst Evol Microbiol 2025; 75:6824.
- ❗ Streptomyces libani 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 Streptomyces.
- 😷 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". — 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 7 times in PubMed until 2026-06-11.
- 🙅 This name is on the List of Recommended Names for bacteria of medical importance (LoRN) as a synonym of the name to be applied to this species. The name is on LoRN because of the recorded risk group of the genus.

Subdivision:

Number of child taxa with a validly published and correct name: 1
Number of child taxa with a validly published name, including synonyms: 2
Total number of child taxa: 3

Child taxa:

Name	Nomenclatural status	Taxonomic status
Streptomyces libani subsp. libani Baldacci and Grein 1966 (Approved Lists 1980)	validly published under the ICNP	correct name
"Streptomyces libani subsp. rubropurpureus" Iwami et al. 1986	not validly published	preferred name
Streptomyces libani subsp. rufus Baldacci and Grein 1966 (Approved Lists 1980)	validly published under the ICNP	synonym

Parent taxon: Streptomyces Waksman and Henrici 1943 (Approved Lists 1980)

Assigned by: Baldacci E, Grein A. Streptomyces avellaneus and Streptomyces libani: two new species characterized by a hazel-nut brown (avellaneus) aerial mycelium. Giornale di Microbiologia 1966; 14:185-198.

Linking: To permanently link to this page, use https://doi.org/10.83108/rn.781804Link copied to clipboard

Record number: 781804

This LPSN page was printed on 2026-08-12 17:26:22

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Species Streptomyces libani