Order Spirochaetales

Warning: In the List of Prokaryotic names with Standing in Nomenclature, an arrow () only indicates the sequence of valid publication of names and does not mean that the last name in the sequence must be used (see: Introduction).

Classification (Warning: see also the file "Classification of prokaryotes: Introduction").

For a detailed description of this taxon see Bergey’s Manual of Systematics of Archaea and Bacteria (BMSAB).


Spirochaetales Buchanan 1917, ordo. (Type order of the class ¤ Spirochaetes Cavalier-Smith 2002).
Type genus: ¤ Spirochaeta Ehrenberg 1835 (Approved Lists 1980).
Etymology: N.L. fem. n. Spirochaeta, type genus of the order; suff. -ales, ending denoting an order; N.L. fem. pl. n. Spirochaetales, the Spirochaeta order.
Approved Lists reference: SKERMAN (V.B.D.), McGOWAN (V.) and SNEATH (P.H.A.) (editors): Approved Lists of Bacterial Names. Int. J. Syst. Bacteriol., 1980, 30, 225-420 (Approved Lists of Bacterial Names in IJSEM Online - Approved Lists of Bacterial Names Amended edition).
Original publication: BUCHANAN (R.E.): Studies in the nomenclature and classification of bacteria. II. The primary subdivisions of the Schizomycetes. Journal of Bacteriology, 1917, 2, 155-164.

Spirochaetales Buchanan 1917 emend. Gupta et al. 2014.
Valid publication: Validation List no. 156. List of new names and new combinations previously effectively, but not validly, published. Int. J Syst. Evol. Microbiol., 64 (2014), 693-696.
Validation List Online
Effective publication: GUPTA, R. S., MAHMOOD, S. and ADEOLU, M. 2013. A phylogenomic and molecular signature based approach for characterization of the phylum Spirochaetes and its major clades: proposal for a taxonomic revision of the phylum. Front. Microbiol., 4, 217.
Effective publication Online