Name: Clostridia Rainey 2010

Category: Class

Proposed as: class. nov.

Etymology: Clos.tri’di.a. N.L. neut. dim. n. Clostridium, type genus of the type order of the class; N.L. neut. dim. pl. n. Clostridia, the class of the Clostridiales (nominative plural of Clostridium)

Gender: neuter

Type genus: Clostridium Prazmowski 1880 (Approved Lists 1980)

Effective publication: Rainey FA. Class II. Clostridia class nov. In: De Vos P, Garrity GM, Jones D, Krieg NR, Ludwig W, Rainey FA, K.-H. S, Whitman WB (eds), Bergey's Manual of Systematic Bacteriology, 2nd edn, vol. 3 (The Firmicutes), Springer, New York, 2009, p. 736.

IJSEM list: Euzeby JP. Validation list no. 132. List of new names and new combinations previously effectively, but not validly, published. Int J Syst Evol Microbiol 2010; 60:469-472.

Nomenclatural status: validly published under the ICNP

Taxonomic status: correct name

• Synonyms:

  • Name	Kind
    "Clostridiia" Cavalier-Smith 2020	homotypic synonym, not validly published
    "Halanaerobiia" Cavalier-Smith 2020	heterotypic synonym, not validly published
    "Natranaerobiia" Sorokin et al. 2021	heterotypic synonym, not validly published

• Notes:
  • De Vos et al. (2009) assigned the order Clostridiales Prévot 1953 (Approved Lists 1980) to this class. Publication: Rainey FA. Class II. Clostridia class nov. In: De Vos P, Garrity GM, Jones D, Krieg NR, Ludwig W, Rainey FA, K.-H. S, Whitman WB (eds), Bergey's Manual of Systematic Bacteriology, 2nd edn, vol. 3 (The Firmicutes), Springer, New York, 2009, p. 736.
  • Glendinning et al. (2020) assigned the order "Christensenellales" Parks et al. 2018 to this class. Publication: Glendinning L, Stewart RD, Pallen MJ, Watson KA, Watson M. Assembly of hundreds of novel bacterial genomes from the chicken caecum. Genome Biol 2020; 21:34.
  • Glendinning et al. (2020) assigned the order "Oscillospirales" Glendinning et al. 2020 to this class. Publication: Glendinning L, Stewart RD, Pallen MJ, Watson KA, Watson M. Assembly of hundreds of novel bacterial genomes from the chicken caecum. Genome Biol 2020; 21:34.
  • Glendinning et al. (2020) assigned the order "Lachnospirales" Parks et al. 2018 to this class. Publication: Glendinning L, Stewart RD, Pallen MJ, Watson KA, Watson M. Assembly of hundreds of novel bacterial genomes from the chicken caecum. Genome Biol 2020; 21:34.
  • Hildebrand et al. (2019) assigned the order "Candidatus Comantemales" Hildebrand et al. 2019 to this class. Publication: Hildebrand F, Moitinho-Silva L, Blasche S, Jahn MT, Gossmann TI, Huerta-Cepas J, Hercog R, Luetge M, Bahram M, Pryszlak A, et al. Antibiotics-induced monodominance of a novel gut bacterial order. Gut 2019; 68:1781-1790.
  • Hildebrand et al. (2020) assigned the order "Candidatus Borkfalkiales" Hildebrand et al. 2020 to this class. Publication: Hildebrand F, Pallen MJ, Bork P. Towards standardisation of naming novel prokaryotic taxa in the age of high-throughput microbiology. Gut 2020; 69:1358-1359.
  • Ndongo et al. (2019) assigned the genus "Massilicoli" Ndongo et al. 2019 to this class. Publication: Ndongo S, Tall ML, Ngom II, Fournier PE, Levasseur A, Raoult D, Khelaifia S. Massilicoli timonensis sp. nov., a new bacterium isolated from the human microbiota. New Microbes New Infect 2019; 32:100592.
  • Petzoldt et al. (2016) assigned the genus Harryflintia Petzoldt et al. 2016 to this class. Publication: Petzoldt D, Breves G, Rautenschlein S, Taras D. Harryflintia acetispora gen. nov., sp. nov., isolated from chicken caecum. Int J Syst Evol Microbiol 2016; 66:4099-4104.
  • Westerholm et al. (2010) assigned the genus Syntrophaceticus Westerholm et al. 2011 to this class. Publication: Westerholm M, Roos S, Schnurer A. Syntrophaceticus schinkii gen. nov., sp. nov., an anaerobic, syntrophic acetate-oxidizing bacterium isolated from a mesophilic anaerobic filter. FEMS Microbiol Lett 2010; 309:100-104.
  • The type genus of this class has alternatively been placed in the class Teichobacteria Cavalier-Smith 2002. Publication: Cavalier-Smith T. The neomuran origin of archaebacteria, the negibacterial root of the universal tree and bacterial megaclassification. Int J Syst Evol Microbiol 2002; 52:7-76.
  • Taxonomists who have recently focused on this group are the corresponding authors of Lv et al. (2020). Editors in search of reviewers are advised to consider additional criteria such as whether a taxon is covered by one of the ICSP subcommittees.
  • The BRCs most frequently used for deposits in this group are: DSM: 1298; ATCC: 686; JCM: 573; CCUG: 291; CIP: 209; KCTC: 166; NCTC: 128; LMG: 116; VKM: 111; NBRC: 110.
  • Nomenclatural type changed from Clostridiales Prévot 1953 (Approved Lists 1980) based on new Rule 22. Publication: Oren A. Emendation of Rules 8, 15, 22, 25a, 30(3)(b), 30(4), 34a, and Appendix 7 of the International Code of Nomenclature of Prokaryotes. Int J Syst Evol Microbiol 2023; 73:6070.
  • This name was mentioned in a Request for an Opinion. Publication: Oren A, Parte A, Garrity GM. Implementation of Rule 8 of the International Code of Nomenclature of Prokaryotes for the renaming of classes. Request for an Opinion. Int J Syst Evol Microbiol 2016; 66:4296-4298.
  • This name was mentioned in a Request for an Opinion. Rule 8 of the 2022 revision of the ICNP does not require that the name of a class validly published before 1 January 2012 be formed from the stem of the name of the type genus of the type order of the class plus the ending ia. This class name is orthographically correct (nominative plural of a 2nd declension neuter noun). Publication: Goker M. Solving the remaining problems with names of classes. Request for an Opinion. Int J Syst Evol Microbiol 2022; 72:5605.

Subdivision:

Number of child taxa with a validly published and correct name: 6
Number of child taxa with a validly published name, including synonyms: 6
Total number of child taxa: 8

• Child taxa:

  • Name	Nomenclatural status	Taxonomic status
    [Clostridia, not assigned to order]	artificial parent node of taxa incertae sedis
    Eubacteriales Buchanan 1917 (Approved Lists 1980)	validly published under the ICNP	correct name
    Halanaerobiales corrig. Rainey and Zhilina 1995	validly published under the ICNP	correct name
    Haloanaerobiales Rainey and Zhilina 1995	inaccurate spelling	misspelling
    Koleobacterales Sakamoto et al. 2021	validly published under the ICNP	correct name
    Natranaerobiales Mesbah et al. 2007	validly published under the ICNP	correct name
    Thermoanaerobacterales Wiegel 2010	validly published under the ICNP	correct name
    Thermosediminibacterales Zhang et al. 2019	validly published under the ICNP	correct name

Parent taxon: Bacillota Gibbons and Murray 2021

Assigned by: Oren A, Garrity GM. Valid publication of the names of forty-two phyla of prokaryotes. Int J Syst Evol Microbiol 2021; 71:5056.

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Record number: 4793