Species Thermoactinomyces dichotomicus

Name: Thermoactinomyces dichotomicus corrig. (Krassilnikov and Agre 1964) Cross and Goodfellow 1973 (Approved Lists 1980)

Category, proposed as: species, comb. nov.

Basonym: "Actinobifida dichotomica" Krassilnikov and Agre 1964

Etymology: di.cho.to’mi.cus. L. masc. adj. dichotomos, cut in two; N.L. masc. adj. dichotomicus, dichotomous

Pronunciation (Latin), gender: t^her-mo-ak-ti-NO-my-kes di-k^ho-TO-mi-kus, masculine

Type strain: 114; 114 (Department Soil Biology); ATCC 49854; DSM 44778; JCM 9688; KCTC 3667; strain 114 (Department Soil Biology Moscow University); VKM Ac-1435

See detailed strain information at

Conduct genome-based taxonomy at

16S rRNA gene: AF138733 Analyse FASTA

Effective publication: Cross T, Goodfellow M. Taxonomy and classification of the actinomycetes. In: Sykes G, Skinner FA (eds), Actinomycetales, Characteristics and Practical Importance, Academic Press, London, 1973, p. 11-112.

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: Thermoflavimicrobium dichotomicum (Krassilnikov and Agre 1964) Yoon et al. 2005

Risk group: 2

• Synonyms:

  • Name	Kind
    "Actinobifida dichotomica" Krassilnikov and Agre 1964	homotypic synonym, not validly published, basonym of name in Approved Lists
    Thermoactinomyces dichotomica (Krassilnikov and Agre 1964) Cross and Goodfellow 1973 (Approved Lists 1980)	other spelling of name, inaccurate spelling
    Thermoflavimicrobium dichotomicum (Krassilnikov and Agre 1964) Yoon et al. 2005	homotypic synonym, validly published under the ICNP

• Notes:
  • ❗ Thermoactinomyces dichotomicus 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 Thermoactinomyces.
  • 😷 The risk group for Canada has been imported on 2024-02-27. The full classification is: risk group = 2, note = "Animal classification RG: 1 - Security sensitive biological agent: No - Terrestrial animal pathogen under Canadian Food Inspection Agency authority: No - Containment level: Containment Level 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 2026-08-13. 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 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 species itself.
  • 🧍 The original spelling of the specific epithet, dichotomica (sic), has been corrected by Hill et al. 1984. Publication: Hill LR, Skerman VBD, Sneath PHA. Corrigenda to the Approved Lists of Bacterial Names edited for the International Committee on Systematic Bacteriology. Int. J. Syst. Bacteriol. 1984; 34:508-511. 🇬🇧

Parent taxon: Thermoactinomyces Tsiklinsky 1899 (Approved Lists 1980)

Assigned by: Cross T, Goodfellow M. Taxonomy and classification of the actinomycetes. In: Sykes G, Skinner FA (eds), Actinomycetales, Characteristics and Practical Importance, Academic Press, London, 1973, p. 11-112.

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Record number: 782487