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, pronunciation (Latin): neuter (stem: Clostridioid-), klos-tri-di-o-I-des

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. 🇨🇦 Oren A, Göker M. Notification list. Notification that new names and new combinations have appeared in volume 74, part 2 of the IJSEM. Int J Syst Evol Microbiol 2024; 74:6301.
    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: DSM: 3; ATCC: 3; JCM: 3; NCTC: 2; CCRC: 2; LMG: 2; CIP: 2; BCRC: 2; CCUG: 2; NCIMB: 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

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