Name: Micropolyspora rectivirgula (Krassilnikov and Agre 1964) Prauser and Momirova 1970 (Approved Lists 1980)

Category: Species

Proposed as: comb. nov.

Basonym: "Thermopolyspora rectivirgula" Krassilnikov and Agre 1964

Etymology: rec.ti.vir’gu.la. L. masc. perf. part. rectus, straight; L. fem. dim. n. virgula, twig; N.L. fem. dim. n. rectivirgula, straight twig

Pronunciation, gender: rek-ti-WIR-gu-la, feminine

Type strain: ATCC 33515; DSM 43747; IFO 12464; INMI 683; JCM 3057; NBRC 12464; NRRL B-16280; VKM Ac-810

See detailed strain information at

Conduct genome-based taxonomy at

16S rRNA gene: JN010255 Analyse FASTA

Effective publication: Prauser H, Momirova S. [Phage sensitivity, cell wall composition and taxonomy of various thermophilic actinomycetes]. Z Allg Mikrobiol 1970; 10:219-222.

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: Saccharopolyspora rectivirgula (Krassilnikov and Agre 1964) Korn-Wendisch et al. 1989

Risk group: 2

• Synonyms:

  • Name	Kind
    Faenia rectivirgula (Krassilnikov and Agre 1964) Kurup and Agre 1983	homotypic synonym, validly published under the ICNP
    "Thermopolyspora rectivirgula" Krassilnikov and Agre 1964	homotypic synonym, not validly published, basonym of name in Approved Lists
    Saccharopolyspora rectivirgula (Krassilnikov and Agre 1964) Korn-Wendisch et al. 1989	homotypic synonym, validly published under the ICNP
    Micropolyspora faeni Cross et al. 1968 (Approved Lists 1980)	heterotypic synonym, validly published under the ICNP

• Notes:
  • ⏰ According to Kurup and Agre (1983), this species is an earlier heterotypic synonym of Micropolyspora faeni Cross et al. 1968 (Approved Lists 1980). Publication: Kurup VP, Agre NS. Transfer of Micropolyspora rectivirgula (Krasil'nikov and Agre 1964) Lechevalier, Lechevalier, and Becker 1966 to Faenia gen. nov. Int. J. Syst. Bacteriol. 1983; 33:663-665.
  • ❗ Micropolyspora rectivirgula 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 Micropolyspora.
  • 😷 The risk group for Belgium has been imported on 2024-02-05. The full classification is: risk group = 2, note = "human and animal pathogen - biological class of risk animal: 2". — The risk group for Swiss Confederation has been imported on 2024-02-01. The full classification is: risk group = 1, note = "PIIC". — The risk group for Germany has been imported on 2023-10-29. The full classification is: risk group = 1, note = "+". — 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 2 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 species itself.

Parent taxon: Micropolyspora Lechevalier et al. 1961 (Approved Lists 1980)

Assigned by: Prauser H, Momirova S. [Phage sensitivity, cell wall composition and taxonomy of various thermophilic actinomycetes]. Z Allg Mikrobiol 1970; 10:219-222.

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Record number: 778226