Name: Spirochaetia Paster 2020

Category: Class

Proposed as: class. nov.

Etymology: Spi.ro.chae’ti.a. N.L. fem. n. Spirochaeta, type genus of the type order Spirochaetales; N.L. neut. n. suff. -ia, ending to denote a class; N.L. neut. pl. n. Spirochaetia, the class of Spirochaetales

Gender: neuter

Type order: Spirochaetales Buchanan 1917 (Approved Lists 1980)

Effective publication: Paster BJ. Class I. Spirochaetia class. nov. In: Krieg NR, Staley JT, Brown DR, Hedlund BP, Paster BJ (eds), Bergey's Manual of Systematic Bacteriology. The Bacteroidetes, Spirochaetes, Tenericutes (Mollicutes), Acidobacteria, Fibrobacteres, Fusobacteria, Dictyoglomi, Gemmatimonadetes, Lentisphaerae, Verrucomicrobia, Chlamydiae, and Planctomycetes, vol. 4, 2nd ed., Springer, New York, 2010, p. 471-563.

IJSEM list: Oren A, Garrity GM. Validation list no. 195. List of new names and new combinations previously effectively, but not validly, published. Int J Syst Evol Microbiol 2020; 70:4844-4847.

Nomenclatural status: validly published under the ICNP

Taxonomic status: orphaned class

• Synonyms:

  • Name	Kind
    Spirochaetes Cavalier-Smith 2002	homotypic synonym, validly published under the ICNP, rejected name
    "Leptospiria" Cavalier-Smith 2020	heterotypic synonym, not validly published
    "Spirochaetia" Cavalier-Smith 2020	homotypic synonym, not validly published

• Notes:
  • Cavalier-Smith and Chao (2020) assigned this class to the phylum "Spirochaetae" Cavalier-Smith 2002. Publication: Cavalier-Smith T, Chao EE. Multidomain ribosomal protein trees and the planctobacterial origin of neomura (eukaryotes, archaebacteria). Protoplasma 2020; 257:621-753.
  • The type order of this class has alternatively been placed in the class Schizomycetes Nägeli 1857 (Approved Lists 1980). Publication: Breed RS, Murray EG, Hitchens AP. THE OUTLINE CLASSIFICATION USED IN THE BERGEY MANUAL OF DETERMINATIVE BACTERIOLOGY. Bacteriol Rev 1944; 8:255-260.
  • The type order of this class has alternatively been placed in the class Spirochaetes 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.
  • This taxon name is occasionally misprinted in some sources as: "Spirochaeia".
  • Spirochaetia is the correct name if this class is regarded as a separate class (i.e., if its nomenclatural type is not assigned to another class whose name is validly published, legitimate and not rejected and has priority).

Subdivision:

Number of child taxa with a validly published and correct name: 4
Number of child taxa with a validly published name, including synonyms: 4
Total number of child taxa: 5

• Child taxa:

  • Name	Nomenclatural status	Taxonomic status
    Brachyspirales Gupta et al. 2014	validly published under the ICNP	correct name
    Brevinematales Gupta et al. 2014	validly published under the ICNP	correct name
    Leptospirales Gupta et al. 2014	validly published under the ICNP	correct name
    Spirochaetales Buchanan 1917 (Approved Lists 1980)	validly published under the ICNP	correct name
    [Spirochaetia, not assigned to order]	artificial parent node of taxa incertae sedis

Parent taxon: "Spirochaetes" Garrity and Holt 2001

Assigned by: Paster BJ. Class I. Spirochaetia class. nov. In: Krieg NR, Staley JT, Brown DR, Hedlund BP, Paster BJ (eds), Bergey's Manual of Systematic Bacteriology. The Bacteroidetes, Spirochaetes, Tenericutes (Mollicutes), Acidobacteria, Fibrobacteres, Fusobacteria, Dictyoglomi, Gemmatimonadetes, Lentisphaerae, Verrucomicrobia, Chlamydiae, and Planctomycetes, vol. 4, 2nd ed., Springer, New York, 2010, p. 471-563.

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Record number: 13791