Name: Atopobium parvulum (Weinberg et al. 1937) Collins and Wallbanks 1993

Category: Species

Proposed as: comb. nov.

Basonym: "Streptococcus parvulus" Weinberg et al. 1937

Etymology: par’vu.lum. L. neut. adj. parvulum, very small

Gender: neuter

Type strain: 1246; ATCC 33793; CCUG 32760; CIP 102970; DSM 20469; IPP 1246; JCM 10300; PI 0546; VPI 0546

See detailed strain information at

Conduct genome-based taxonomy at

16S rRNA gene: AB558168 Analyse FASTA

Effective publication: Collins MD, Wallbanks S. Comparative sequence analyses of the 16S rRNA genes of Lactobacillus minutus, Lactobacillus rimae and Streptococcus parvulus: proposal for the creation of a new genus Atopobium. FEMS Microbiol. Lett. 1992; 95:235-240.

IJSEM list: Anonymous. Validation list no. 44. Validation of publication of new names and new combinations previously effectively published outside the IJSB. Int J Syst Bacteriol 1993; 43:188-189.

Nomenclatural status: validly published under the ICNP

Taxonomic status: synonym

Correct name: Lancefieldella parvula (Weinberg et al. 1937) Nouioui et al. 2018

Risk group: 2

• Synonyms:

  • Name	Kind
    "Streptococcus parvulus" Weinberg et al. 1937	homotypic synonym, not validly published, basonym of name in Approved Lists
    Peptostreptococcus parvulus (Weinberg et al. 1937) Smith 1957 (Approved Lists 1980)	homotypic synonym, validly published under the ICNP
    Streptococcus parvulus (Weinberg et al. 1937) Cato 1983	homotypic synonym, validly published under the ICNP
    Lancefieldella parvula (Weinberg et al. 1937) Nouioui et al. 2018	homotypic synonym, validly published under the ICNP

• Notes:
  • ❗ Atopobium parvulum 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 Atopobium.
  • 😷 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". — 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.
  • 🎓 Name mentioned 19 times in PubMed until 2024-03-28.
  • 🧍 According to Bartlett et al. (2022), no evidence of human infection was found for this species. Publication: Bartlett A, Padfield D, Lear L, Bendall R, Vos M. A comprehensive list of bacterial pathogens infecting humans. Microbiology 2022; 168:0.
  • 🧍 The genome of the type strain was sequenced as part of the GEBA (Genomic Encyclopedia of Bacteria and Archaea) project. Publication: Copeland A, Sikorski J, Lapidus A, Nolan M, Del Rio TG, Lucas S, Chen F, Tice H, Pitluck S, Cheng JF, et al. Complete genome sequence of Atopobium parvulum type strain (IPP 1246). Stand Genomic Sci 2009; 1:166-173.

Parent taxon: Atopobium Collins and Wallbanks 1993

Assigned by: Collins MD, Wallbanks S. Comparative sequence analyses of the 16S rRNA genes of Lactobacillus minutus, Lactobacillus rimae and Streptococcus parvulus: proposal for the creation of a new genus Atopobium. FEMS Microbiol. Lett. 1992; 95:235-240.

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Record number: 773539