Name: Bryantella formatexigens Wolin et al. 2004

Category: Species

Proposed as: sp. nov.

Etymology: for.mat.ex’i.gens. N.L. neut. n. formatum, formate; L. pres. part. exigens, demanding; N.L. fem. part. adj. formatexigens, formate-demanding

Pronunciation (Latin), gender: bry-an-TEL-la for-mat-EX-i-gens, feminine

Type strain: CCUG 46960; DSM 14469; I-52

See detailed strain information at

Conduct genome-based taxonomy at

16S rRNA gene: AJ505973 Analyse FASTA

Effective publication: Wolin MJ, Miller TL, Collins MD, Lawson PA. Formate-dependent growth and homoacetogenic fermentation by a bacterium from human feces: description of Bryantella formatexigens gen. nov., sp. nov. Appl Environ Microbiol 2003; 69:6321-6326. 🇺🇸

IJSEM list: Euzeby JP. Validation list no. 95. List of new names and new combinations previously effectively, but not validly, published. Int J Syst Evol Microbiol 2004; 54:1-2.

Nomenclatural status: validly published under the ICNP, illegitimate name

Taxonomic status: synonym

Correct name: Marvinbryantia formatexigens (Wolin et al. 2004) Wolin et al. 2008

Risk group: 1

• Synonyms:

  • Name	Kind
    Marvinbryantia formatexigens (Wolin et al. 2004) Wolin et al. 2008	homotypic synonym, validly published under the ICNP

• Notes:
  • 🥇 Nomenclatural type of the genus Bryantella Wolin et al. 2004. Publication: Wolin MJ, Miller TL, Collins MD, Lawson PA. Formate-dependent growth and homoacetogenic fermentation by a bacterium from human feces: description of Bryantella formatexigens gen. nov., sp. nov. Appl Environ Microbiol 2003; 69:6321-6326. 🇺🇸
  • 😷 The risk group for Germany has been imported on 2026-08-13. 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 3 times in PubMed until 2026-06-11.
  • 🧍 The name Bryantella formatexigens Wolin et al. 2004 is illegitimate because the genus name is illegitimate (see Bryantella). Consequently, a new species designation Marvinbryantia formatexigens (Wolin et al. 2004) Wolin et al. 2008 has been proposed by Wolin et al. 2008. Publication: Wolin MJ, Miller TL, Lawson PA. Proposal to replace the illegitimate genus name Bryantella Wolin et al. 2004VP with the genus name Marvinbryantia gen. nov. and to replace the illegitimate combination Bryantella formatexigens Wolin et al. 2004VP with Marvinbryantia formatexigens comb. nov. Int J Syst Evol Microbiol 2008; 58:742-744. 🇺🇸

Parent taxon: Bryantella Wolin et al. 2004

Assigned by: Wolin MJ, Miller TL, Collins MD, Lawson PA. Formate-dependent growth and homoacetogenic fermentation by a bacterium from human feces: description of Bryantella formatexigens gen. nov., sp. nov. Appl Environ Microbiol 2003; 69:6321-6326. 🇺🇸

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Record number: 774259