Name: Anaerostipes hadrus (Moore et al. 1976) Allen-Vercoe et al. 2013

Category: Species

Proposed as: comb. nov.

Basonym: Eubacterium hadrum Moore et al. 1976 (Approved Lists 1980)

Etymology: ha.drus. N.L. masc. adj. hadrus, thick, bulky, referring to the relatively large size of the cell; from Gr. neut. adj. hadron

Gender: masculine

Type strain: ATCC 29173; DSM 3319; JCM 9980; VPI B2-52

See detailed strain information at

Conduct genome-based taxonomy at

16S rRNA gene: FR749932 Analyse FASTA

Effective publication: Allen-Vercoe E, Daigneault M, White A, Panaccione R, Duncan SH, Flint HJ, O'Neal L, Lawson PA. Anaerostipes hadrus comb. nov., a dominant species within the human colonic microbiota; reclassification of Eubacterium hadrum Moore et al. 1976. Anaerobe 2012; 18:523-529.

IJSEM list: Oren A, Garrity GM. Validation list no. 154. List of new names and new combinations previously effectively, but not validly, published. Int J Syst Evol Microbiol 2013; 63:3931-3934.

Nomenclatural status: validly published under the ICNP

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

Risk group: 1

• Synonyms:

  • Name	Kind
    Eubacterium hadrum Moore et al. 1976 (Approved Lists 1980)	homotypic synonym, validly published under the ICNP

• Notes:
  • 😢 The terminology used by the authors is in line with many other taxonomic studies and does not negatively affect their main results; some improvements may nevertheless be possible. Contrasting the term "chemotaxonomic" with "phenotypic" is not recommended. Whether taxa can have "members" is debatable. See the LPSN phylogeny page for details. Publication: Göker M. What can genome analysis offer for bacteria? In: Bridge P, Smith D, Stackebrandt E (eds), Trends in the systematics of bacteria and fungi, CAB International, Wallingford, 2021, p. 255-281.
  • 🧬 The phylogenomic assignment score of this taxon is 0.06485 (N = 68).
  • 😷 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 34 times in PubMed until 2024-03-28.
  • 🙆 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 genus.
  • 🧍 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.

Parent taxon: Anaerostipes Schwiertz et al. 2002

Assigned by: Allen-Vercoe E, Daigneault M, White A, Panaccione R, Duncan SH, Flint HJ, O'Neal L, Lawson PA. Anaerostipes hadrus comb. nov., a dominant species within the human colonic microbiota; reclassification of Eubacterium hadrum Moore et al. 1976. Anaerobe 2012; 18:523-529.

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Record number: 791209