Name: Clostridioides Lawson et al. 2016

Category: Genus

Proposed as: gen. nov.

Etymology: Clos.tri.di.o’i.des. N.L. neut. dim. n. Clostridium, a bacterial genus; L. adj. suff. -oides, resembling, similar; from Gr. neut. adj. suff. -eides, resembling, similar; from Gr. neut. n. eîdos, that which is seen, form, shape, figure; N.L. neut. n. Clostridioides, organism similar to Clostridium

Gender: neuter (stem: Clostridioid-)

Type species: Clostridioides difficile (Hall and O'Toole 1935) Lawson et al. 2016

Conduct genome-based taxonomy of genus at TYGS

16S rRNA gene: Analyse FASTA

Effective publication: Lawson PA, Citron DM, Tyrrell KL, Finegold SM. Reclassification of Clostridium difficile as Clostridioides difficile (Hall and O'Toole 1935) Prevot 1938. Anaerobe 2016; 40:95-99.

IJSEM list: Oren A, Garrity GM. Validation list no. 171. List of new names and new combinations previously effectively, but not validly, published. Int J Syst Evol Microbiol 2016; 66:3761-3764.

Nomenclatural status: validly published under the ICNP

Taxonomic status: correct name

• Emendations:
  • Bello et al. 2024 Bello S, McQuay S, Rudra B, Gupta RS. Robust demarcation of the family Peptostreptococcaceae and its main genera based on phylogenomic studies and taxon-specific molecular markers. Int J Syst Evol Microbiol 2024; 74:6247.
    Notes:
    • ⊖ Emendation accompanied by the removal of 1 species from the genus.

• Notes:
  • 🚋 The type species of this genus has alternatively been placed in the genus Bacillus Cohn 1872 (Approved Lists 1980). Publication: Hall IC, O'Toole E. Intestinal flora in newborn infants with a description of a new pathogenic anaerobe, Bacillus difficilis. American Journal of Diseases of Children 1935; 49:390-402.
  • 🚋 The type species of this genus has alternatively been placed in the genus Clostridium Prazmowski 1880 (Approved Lists 1980). Publication: Prévot AR. Études de systématique bactérienne. IV. Critique de la conception actuelle du genre Clostridium. Annales de l'Institut Pasteur (Paris) 1938; 61:72-91.
  • 🚋 The type species of this genus has alternatively been placed in the genus "Peptoclostridium" 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.
  • 😢 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 BRCs most frequently used for deposits in this group are: ATCC: 3; DSM: 3; JCM: 3; NCTC: 2; LMG: 2; BCRC: 2; NCIMB: 2; CCUG: 2; CIP: 2; CCRC: 2.

Subdivision:

Number of child taxa with a validly published and correct name: 1
Number of child taxa with a validly published name, including synonyms: 2
Total number of child taxa: 3

• Child taxa:

  • Name	Nomenclatural status	Taxonomic status
    Clostridioides difficile (Hall and O'Toole 1935) Lawson et al. 2016	validly published under the ICNP	correct name
    Clostridioides mangenotii (Prévot and Zimmès-Chaverou 1947) Lawson et al. 2016	validly published under the ICNP	synonym
    "Clostridioides perfringens" (Veillon and Zuber 1898) Gal et al. 2021	not validly published	synonym (and no standing)

Parent taxon: Peptostreptococcaceae Ezaki 2010

Assigned by: Bello S, McQuay S, Rudra B, Gupta RS. Robust demarcation of the family Peptostreptococcaceae and its main genera based on phylogenomic studies and taxon-specific molecular markers. Int J Syst Evol Microbiol 2024; 74:6247.

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Record number: 518997