Name: Ruminococcus obeum Moore et al. 1976 (Approved Lists 1980)

Category: Species

Proposed as: sp. nov.

Etymology: o’be.um. N.L. neut. n. obeum, egg (nominative in apposition)

Gender: masculine

Type strain: ATCC 29174; DSM 25238; KCTC 15206

See detailed strain information at

Conduct genome-based taxonomy at

16S rRNA gene: X85101 Analyse FASTA

Effective publication: Moore WEC, Johnson JL, Holdeman LV. Emendation of Bacteriodaceae and Butyrivibrio and descriptions of Desulfomonas gen. nov. and ten new species in the genera Desulfomonas, Butyrivibrio, Eubacterium, Clostridium, and Ruminococcus. International Journal of Systematic Bacteriology 1976; 26:238-252.

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

Correct name: Blautia obeum (Moore et al. 1976) Lawson and Finegold 2015

Risk group: 1

• Synonyms:

  • Name	Kind
    Blautia obeum (Moore et al. 1976) Lawson and Finegold 2015	homotypic synonym, validly published under the ICNP

• Notes:
  • ❗ Ruminococcus obeum 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 Ruminococcus.
  • 😷 The risk group for Canada has been imported on 2024-02-27. The full classification is: risk group = 1, note = "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 = 1. — The risk group for Germany has been imported on 2023-10-29. The full classification is: risk group = 1. — 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 37 times in PubMed until 2024-03-28.
  • 🧍 Ruminococcus obeum Moore et al. 1976 (Approved Lists 1980) is clearly a member of the genus Blautia, as currently defined. The rules of the Bacteriological Code require that the type strains of all new species and subspecies (including new combinations) be deposited in two different collections in two different countries. The type strain of Ruminococcus obeum is only deposited in the ATCC and a second independent deposit, as required by the Code, has not been possible. Consequently, the transfer of this species to the genus Blautia cannot be made because the resulting species name would not conform to the Rules of the Code governing the valid publication of species names and deposit of type material (Rules 27 and 30) and consequently would not be considered to be validly published. Publication: Oren A, Arahal DR, Goker M, Moore ERB, Rossello-Mora R, Sutcliffe IC. International Code of Nomenclature of Prokaryotes. Prokaryotic Code (2022 Revision). Int J Syst Evol Microbiol 2023; 73:5585.
  • 🧍 Ruminococcus obeum Moore et al. 1976 (Approved Lists 1980) is clearly a member of the genus Blautia, as currently defined. The rules of the Bacteriological Code require that the type strains of all new species and subspecies (including new combinations) be deposited in two different collections in two different countries. In 2008, the type strain of Ruminococcus obeum was only deposited in the ATCC and a second independent deposit, as required by the Code, has not been possible. Consequently, the transfer of this species to the genus Blautia cannot be made by Liu et al. 2008, because the resulting species name would not conform to the Rules of the Code governing the valid publication of species names and deposit of type material (Rules 27 and 30) and consequently would not be considered to be validly published. Publication: Liu C, Finegold SM, Song Y, Lawson PA. Reclassification of Clostridium coccoides, Ruminococcus hansenii, Ruminococcus hydrogenotrophicus, Ruminococcus luti, Ruminococcus productus and Ruminococcus schinkii as Blautia coccoides gen. nov., comb. nov., Blautia hansenii comb. nov., Blautia hydrogenotrophica comb. nov., Blautia luti comb. nov., Blautia producta comb. nov., Blautia schinkii comb. nov. and description of Blautia wexlerae sp. nov., isolated from human faeces. Int J Syst Evol Microbiol 2008; 58:1896-1902.

Parent taxon: Ruminococcus Sijpesteijn 1948 (Approved Lists 1980)

Assigned by: Moore WEC, Johnson JL, Holdeman LV. Emendation of Bacteriodaceae and Butyrivibrio and descriptions of Desulfomonas gen. nov. and ten new species in the genera Desulfomonas, Butyrivibrio, Eubacterium, Clostridium, and Ruminococcus. International Journal of Systematic Bacteriology 1976; 26:238-252.

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Record number: 784838