Species Streptomyces janthinus

Name: Streptomyces janthinus (Artamonova and Krassilnikov 1960) Pridham 1970 (Approved Lists 1980)

Category: Species

Proposed as: comb. nov.

Basonym: "Actinomyces janthinus" Artamonova and Krassilnikov 1960

Etymology: jan.thi’nus. L. masc. adj. janthinus, violet-colored, referring to color of vegetative mycelium and diffusible pigment

Gender: masculine

Type strain: ATCC 15870; ATCC 23925; CBS 909.68; DSM 40206; IFO 12879; INMI 117; JCM 4387; KCC S-387; NBRC 12879; NRRL B-3365; NRRL ISP-5206; RIA 659

Conduct genome-based taxonomy at

16S rRNA gene: AB184851 Analyse FASTA

Effective publication: Pridham TG. New names and new combinations in the order Actinomycetales Buchanan 1917. Bulletin of the United States Department of Agriculture 1970; 1424:1-55.

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 violaceus (Rossi Doria 1891) Waksman 1953 (Approved Lists 1980)

Risk group: 1

Synonyms:

Name	Kind
"Streptotrix violacea" Rossi Doria 1891	heterotypic synonym, not validly published, basonym of name in Approved Lists
"Actinomyces janthinus" Artamonova and Krassilnikov 1960	homotypic synonym, not validly published, basonym of name in Approved Lists
"Actinomyces violatus" Artamonova and Krassilnikov 1960	heterotypic synonym, not validly published, basonym of name in Approved Lists
Streptomyces violatus (Artamonova and Krassilnikov 1960) Pridham 1970 (Approved Lists 1980)	heterotypic synonym, validly published under the ICNP
Streptomyces violaceus (Rossi Doria 1891) Waksman 1953 (Approved Lists 1980)	heterotypic synonym, validly published under the ICNP

Notes:
- ⏲ According to Li et al. (2025), this species is a later heterotypic synonym of "Streptotrix violacea" Rossi Doria 1891. Publication: Li K, Qian Y, Li B, Liang W. Proposal of Streptomyces janthinus (Artamonova and Krassilnikov 1960) Pridham 1970 (Approved Lists 1980) as a later heterotypic synonym of Streptomyces violaceus (Rossi Doria 1891) Waksman 1953 (Approved Lists 1980) and an emended description of Streptomyces violaceus. Int J Syst Evol Microbiol 2025; 75:6892. 🇨🇳
- ⏲ According to Li et al. (2025), this species is a later heterotypic synonym of Streptomyces violaceus (Rossi Doria 1891) Waksman 1953 (Approved Lists 1980). Publication: Li K, Qian Y, Li B, Liang W. Proposal of Streptomyces janthinus (Artamonova and Krassilnikov 1960) Pridham 1970 (Approved Lists 1980) as a later heterotypic synonym of Streptomyces violaceus (Rossi Doria 1891) Waksman 1953 (Approved Lists 1980) and an emended description of Streptomyces violaceus. Int J Syst Evol Microbiol 2025; 75:6892. 🇨🇳
- ❗ Streptomyces janthinus 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". — 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 0 times in PubMed until 2025-06-04.
- 🙅 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.

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

Assigned by: Pridham TG. New names and new combinations in the order Actinomycetales Buchanan 1917. Bulletin of the United States Department of Agriculture 1970; 1424:1-55.

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Record number: 781771

This LPSN page was printed on 2026-02-10 13:03:03

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Species Streptomyces janthinus