Name: Schaalia meyeri (Cato et al. 1984 ex Prévot 1938) Nouioui et al. 2018

Category: Species

Proposed as: comb. nov.

Basonym: Actinomyces meyeri (ex Prévot 1938) Cato et al. 1984

Etymology: me’yer.i. N.L. gen. masc. n. meyeri, of Meyer, to honor Kurt F. Meyer, a German bacteriologist, who described the organism as a “new anaerobic Streptothrix species” in 1911

Gender: feminine

Type strain: ATCC 35568; CCUG 21024; CIP 103148; DSM 20733; LMG 16161; NCTC 14282; Prévot 2477B; VPI 8617

See detailed strain information at

Conduct genome-based taxonomy at

16S rRNA gene: X82451 Analyse FASTA

Effective publication: Nouioui I, Carro L, Garcia-Lopez M, Meier-Kolthoff JP, Woyke T, Kyrpides NC, Pukall R, Klenk HP, Goodfellow M, Goker M. Genome-Based Taxonomic Classification of the Phylum Actinobacteria. Front Microbiol 2018; 9:2007.

IJSEM list: Oren A, Garrity GM. Validation list no. 184. List of new names and new combinations previously effectively, but not validly, published. Int J Syst Evol Microbiol 2018; 68:3379-3393.

Nomenclatural status: validly published under the ICNP

Taxonomic status: correct name (and explicitly recommended for medical use)

Risk group: 2

• Synonyms:

  • Name	Kind
    Actinomyces meyeri (ex Prévot 1938) Cato et al. 1984	homotypic synonym, validly published under the ICNP

• Notes:
  • 🧬 The phylogenomic assignment score of this taxon is 0.25530 (N = 13).
  • 😷 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: 1 - Security sensitive biological agent: No - Terrestrial animal pathogen under Canadian Food Inspection Agency authority: No - Containment level: Containment Level 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 2 times in PubMed until 2025-06-04.
  • 🫡 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. This name is not taxonomically suspended any more in favour of Actinomyces meyeri (ex Prévot 1938) Cato et al. 1984. Publication: Cato EP, Moore WEC, Nygaard G, Holdeman LV. Actinomyces meyeri sp. nov., specific epithet rev. Int. J. Syst. Bacteriol. 1984; 34:487-489.

Parent taxon: Schaalia Nouioui et al. 2018

Assigned by: Nouioui I, Carro L, Garcia-Lopez M, Meier-Kolthoff JP, Woyke T, Kyrpides NC, Pukall R, Klenk HP, Goodfellow M, Goker M. Genome-Based Taxonomic Classification of the Phylum Actinobacteria. Front Microbiol 2018; 9:2007.

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Record number: 798116