Name: Veillonella alcalescens Prévot 1933 (Approved Lists 1980)

Category: Species

Proposed as: sp. nov.

Etymology: al.ca.les’cens. N.L. fem. part. adj. alcalescens, alkaline-making

Pronunciation (Latin), gender: … al-ka-LES-kens, feminine

Type strain: ATCC 17745; CCUG 5122; NCTC 11809

Conduct genome-based taxonomy at

16S rRNA gene: AY995769 Analyse FASTA

Effective publication: Prévot AR. Etude de systématique bactérienne. I. Lois générales. II. Cocci anaérobies. Annales des Sciences Naturelles Zoologie et Biologie Animale 1933; 15:23-260.

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: Veillonella parvula (Veillon and Zuber 1898) Prévot 1933 (Approved Lists 1980)

Risk group: 2

• Synonyms:

  • Name	Kind
    Veillonella parvula (Veillon and Zuber 1898) Prévot 1933 (Approved Lists 1980)	heterotypic synonym, validly published under the ICNP
    "Staphylococcus parvulus" Veillon and Zuber 1898	heterotypic synonym, not validly published, basonym of name in Approved Lists

• Emendations:
  • Heng et al. 2025 Heng YC, Lee JKY, Silvaraju S, Kittelmann S. Description of Megasphaera jansseni sp. nov., a novel short- and medium-chain fatty acid-producing species isolated from faeces of a wild boar (Sus scrofa), and a taxonomic note on the family Veillonellaceae. Int J Syst Evol Microbiol 2025; 75:6937. 🇸🇬 Oren A, Göker M. Notification list. Notification that new names and new combinations have appeared in volume 75, part 10 of the IJSEM. Int J Syst Evol Microbiol 2026; 76:6976.
    Notes:
    • 🫂 Emendation accompanied by a proposal regarding the synonymy of the species.

• Notes:
  • ⏲ According to Heng et al. (2025), this species is not a later heterotypic synonym of "Staphylococcus parvulus" Veillon and Zuber 1898. Publication: Heng YC, Lee JKY, Silvaraju S, Kittelmann S. Description of Megasphaera jansseni sp. nov., a novel short- and medium-chain fatty acid-producing species isolated from faeces of a wild boar (Sus scrofa), and a taxonomic note on the family Veillonellaceae. Int J Syst Evol Microbiol 2025; 75:6937. 🇸🇬
  • ⏲ According to Heng et al. (2025), this species is not a later heterotypic synonym of Veillonella parvula (Veillon and Zuber 1898) Prévot 1933 (Approved Lists 1980). Publication: Heng YC, Lee JKY, Silvaraju S, Kittelmann S. Description of Megasphaera jansseni sp. nov., a novel short- and medium-chain fatty acid-producing species isolated from faeces of a wild boar (Sus scrofa), and a taxonomic note on the family Veillonellaceae. Int J Syst Evol Microbiol 2025; 75:6937. 🇸🇬
  • ⏲ According to Mays et al. (1982), this species is a later heterotypic synonym of "Staphylococcus parvulus" Veillon and Zuber 1898. Publication: Mays TD, Holdeman LV, Moore WEC, Rogosa M, Johnson JL. Taxonomy of the genus Veillonella Prévot. Int. J. Syst. Bacteriol. 1982; 32:28-36. 🇺🇸
  • ⏲ According to Mays et al. (1982), this species is a later heterotypic synonym of Veillonella parvula (Veillon and Zuber 1898) Prévot 1933 (Approved Lists 1980). Publication: Mays TD, Holdeman LV, Moore WEC, Rogosa M, Johnson JL. Taxonomy of the genus Veillonella Prévot. Int. J. Syst. Bacteriol. 1982; 32:28-36. 🇺🇸
  • ❗ Veillonella alcalescens 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 Veillonella.
  • 😷 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 = "subp. criceti: 2 Animal classification RG: 1 - Security sensitive biological agent: No - Terrestrial animal pathogen under Canadian Food Inspection Agency authority: No - Containment level: Containment Level 2; default: 1 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 = 2. — The risk group for Germany has been imported on 2023-10-29. 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 97 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.

Subdivision:

Number of child taxa with a validly published and correct name: 0
Number of child taxa with a validly published name, including synonyms: 4
Total number of child taxa: 4

• Child taxa:

  • Name	Nomenclatural status	Taxonomic status
    Veillonella alcalescens subsp. alcalescens (Prévot 1933) Rogosa 1965 (Approved Lists 1980)	validly published under the ICNP	synonym
    Veillonella alcalescens subsp. criceti Rogosa 1965 (Approved Lists 1980)	validly published under the ICNP	synonym
    Veillonella alcalescens subsp. dispar Rogosa 1965 (Approved Lists 1980)	validly published under the ICNP	synonym
    Veillonella alcalescens subsp. ratti Rogosa 1965 (Approved Lists 1980)	validly published under the ICNP	synonym

Parent taxon: Veillonella Prévot 1933 (Approved Lists 1980)

Assigned by: Prévot AR. Etude de systématique bactérienne. I. Lois générales. II. Cocci anaérobies. Annales des Sciences Naturelles Zoologie et Biologie Animale 1933; 15:23-260.

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Record number: 785140