Name: "Tyzzerella nexilis" (Holdeman and Moore 1974) Yutin and Galperin 2013

Category: Species

Proposed as: comb. nov.

Basonym: Clostridium nexile Holdeman and Moore 1974 (Approved Lists 1980)

Etymology: ne’xi.lis. L. fem. adj. nexilis, tied or bound together, referring to its chain formation

Pronunciation (Latin), gender: … NE-ksi-lis, feminine

Nomenclatural type: ATCC 27757; DSM 1787; JCM 31500; VPI C48-37

See detailed strain information at

Conduct genome-based taxonomy at

16S rRNA gene: X73443 Analyse FASTA

Original publication: Yutin N, Galperin MY. A genomic update on clostridial phylogeny: Gram-negative spore formers and other misplaced clostridia. Environ Microbiol 2013; 15:2631-2641. 🇺🇸

Nomenclatural status: not validly published

Taxonomic status: synonym (and no standing)

Correct name: Faecalimonas nexilis (Holdeman and Moore 1974) Yamamoto et al. 2026

• Synonyms:

  • Name	Kind
    Faecalimonas nexilis (Holdeman and Moore 1974) Yamamoto et al. 2026	homotypic synonym, validly published under the ICNP
    Clostridium nexile Holdeman and Moore 1974 (Approved Lists 1980)	homotypic synonym, validly published under the ICNP

• Notes:
  • 🥇 Nomenclatural type of the genus "Tyzzerella" Yutin and Galperin 2013. Publication: Yutin N, Galperin MY. A genomic update on clostridial phylogeny: Gram-negative spore formers and other misplaced clostridia. Environ Microbiol 2013; 15:2631-2641. 🇺🇸

Parent taxon: "Tyzzerella" Yutin and Galperin 2013

Assigned by: Yutin N, Galperin MY. A genomic update on clostridial phylogeny: Gram-negative spore formers and other misplaced clostridia. Environ Microbiol 2013; 15:2631-2641. 🇺🇸

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Record number: 7635