Name: Arachnia propionica (Buchanan and Pine 1962) Pine and Georg 1969 (Approved Lists 1980)

Category: Species

Proposed as: comb. nov.

Basonym: "Actinomyces propionicus" Buchanan and Pine 1962

Etymology: pro.pi.o’ni.ca. N.L. neut. n. acidum propionicum, propionic acid; L. fem. adj. suff. -ica, suffix used with the sense of pertaining to; N.L. fem. adj. propionica, pertaining to propionic acid

Pronunciation (Latin), gender: a-RAK^H-ni-a pro-pi-O-ni-ka, feminine

Type strain: ATCC 14157; CCUG 4939; CIP 101941; DSM 43307; IFO 14587; JCM 5830; NBRC 14587; NCTC 12967; VKM Ac-1449

See detailed strain information at

Conduct genome-based taxonomy at

16S rRNA gene: AJ315953 Analyse FASTA

Effective publication: Pine L, Georg LK. Reclassification of Actinomyces propionicus. International Journal of Systematic Bacteriology 1969; 19:267-272.

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 (and explicitly recommended for medical use)

Risk group: 2

• Synonyms:

  • Name	Kind
    Propionibacterium propionicus (Buchanan and Pine 1962) Charfreitag et al. 1988	homotypic synonym, inaccurate spelling
    Pseudopropionibacterium propionicum (Buchanan and Pine 1962) Scholz and Kilian 2016	homotypic synonym, validly published under the ICNP, illegitimate name
    Propionibacterium propionicum corrig. (Buchanan and Pine 1962) Charfreitag et al. 1988	homotypic synonym, validly published under the ICNP
    "Actinomyces propionicus" Buchanan and Pine 1962	homotypic synonym, not validly published, basonym of name in Approved Lists

• Emendations:
  • Tindall 2019 Tindall BJ. Arachnia propionica (Buchanan and Pine 1962) Pine and Georg 1969 (Approved Lists 1980), Propionibacterium propionicum corrig. (Buchanan and Pine 1962) Charfreitag et al. 1988 and Pseudopropionibacterium propionicum (Buchanan and Pine 1962) Scholz and Kilian 2016 and the nomenclatural consequences of changes in the taxonomy of the genus Propionibacterium. Int J Syst Evol Microbiol 2019; 69:2612-2615. 🇩🇪 Oren A, Garrity GM. Notification list. Notification that new names and new combinations have appeared in volume 69, part 8 of the IJSEM. Int J Syst Evol Microbiol 2019; 69:3315-3317.

• Notes:
  • 🥇 Nomenclatural type of the genus Arachnia Pine and Georg 1969 (Approved Lists 1980). Publication: Pine L, Georg LK. Reclassification of Actinomyces propionicus. International Journal of Systematic Bacteriology 1969; 19:267-272.
  • 😷 The risk group for Belgium has been imported on 2024-02-05. The full classification is: risk group = 2, note = "human pathogen". — The risk group for Canada has been imported on 2024-02-27. The full classification is: risk group = 2, note = "Animal classification RG: 2 - 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 = 2. — The risk group for Germany has been imported on 2026-08-13. The full classification is: risk group = 2. — 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 45 times in PubMed until 2026-06-11.
  • 🙆 This name is on the List of Recommended Names for bacteria of medical importance (LoRN) as 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: Arachnia Pine and Georg 1969 (Approved Lists 1980)

Assigned by: Pine L, Georg LK. Reclassification of Actinomyces propionicus. International Journal of Systematic Bacteriology 1969; 19:267-272.

Linking: To permanently link to this page, use https://doi.org/10.83108/rn.773347Copy to clipboardLink copied to clipboard

Record number: 773347