Name: Acetivibrio multivorans Tanaka et al. 1992

Category: Species

Proposed as: sp. nov.

Etymology: mul.ti.vo’rans. L. masc. adj. multus, many, numerous; L. pres. part. vorans, devouring, eating greedily; N.L. masc. part. adj. multivorans, devouring many kinds of substrates

Gender: masculine

Type strain: ATCC 49731; DSM 6139; PeC1

See detailed strain information at

Conduct genome-based taxonomy at

16S rRNA gene: FR749900 Analyse FASTA

Effective publication: Tanaka K, Nakamura K, Mikami E. Fermentation of cinnamate by a mesophilic strict anaerobe, Acetivibrio multivorans sp. nov. Arch. Microbiol. 1991; 155:120-124.

IJSEM list: Anonymous. Validation list no. 40. Validation of publication of new names and new combinations previously effectively published outside the IJSB. Int J Syst Bacteriol 1992; 42:191-192.

Nomenclatural status: validly published under the ICNP

Taxonomic status: synonym

Correct name: Youngiibacter multivorans (Tanaka et al. 1992) Lawson et al. 2014

Risk group: 1

• Synonyms:

  • Name	Kind
    Youngiibacter multivorans (Tanaka et al. 1992) Lawson et al. 2014	homotypic synonym, validly published under the ICNP

• Notes:
  • ❗ Acetivibrio multivorans 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 Acetivibrio.
  • 😷 The risk group for Canada has been imported on 2024-02-27. The full classification is: risk group = 1, note = "Animal classification RG: 1 - Security sensitive biological agent: No - Terrestrial animal pathogen under Canadian Food Inspection Agency authority: No - Containment level: Containment Level 1". — 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 2 times in PubMed until 2024-03-28.
  • 🧍 Yarza et al. (2013) expected for accession FR749900, originating from the alleged type-strain deposit DSM 6139, an affiliation with Ruminococcaceae (Clostridia) but observed an affiliation with Clostridiaceae (Clostridia) and 93.8% similarity against Clostridium cavendishii; 84.7% against Acetivibrio cellulolyticus. Publication: Yarza P, Sproer C, Swiderski J, Mrotzek N, Spring S, Tindall BJ, Gronow S, Pukall R, Klenk HP, Lang E, et al. Sequencing orphan species initiative (SOS): Filling the gaps in the 16S rRNA gene sequence database for all species with validly published names. Syst Appl Microbiol 2013; 36:69-73.
  • 🧍 The 16S rRNA gene sequence of the type strain shows an unexpected affiliation with the family Clostridiaceae (93.8% similarity against Clostridium cavendishii; 84.7% against Acetivibrio cellulolyticus). Publication: Yarza P, Sproer C, Swiderski J, Mrotzek N, Spring S, Tindall BJ, Gronow S, Pukall R, Klenk HP, Lang E, et al. Sequencing orphan species initiative (SOS): Filling the gaps in the 16S rRNA gene sequence database for all species with validly published names. Syst Appl Microbiol 2013; 36:69-73.

Parent taxon: Acetivibrio Patel et al. 1980

Assigned by: Tanaka K, Nakamura K, Mikami E. Fermentation of cinnamate by a mesophilic strict anaerobe, Acetivibrio multivorans sp. nov. Arch. Microbiol. 1991; 155:120-124.

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Record number: 772483