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. 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 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.
  • 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