Cavalier-Smith (2002) assigned this class to the phylum "Spirochaetae" 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.
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 "Spirochaetia" Paster 2010.Publication:
Krieg NR. Order I. Bacteroidales ord. nov. In: Krieg NR, Staley JT, Brown DR, Hedlund BP, Paster BJ, Ward NL, Ludwig W, Whitman WB (eds), Bergey's Manual of Systematic Bacteriology, 2nd edn, vol. 4, Springer, New York, 2010, p. 25.
This taxon name is occasionally misprinted in some sources as: "Spirochatetes"; "Spirochetes"; "Spriochaetes".
Rejected Name (Judicial Commission, Opinion 79 suppl.; IJSEM 64: 3599–3602).Publication:
Tindall BJ. Names at the rank of class, subclass and order, their typification and current status: Supplementary information to Opinion 79. Judicial Commission of the International Committee on Systematics of Prokaryotes. Int J Syst Evol Microbiol 2014; 64:3599-3602.
Number of child taxa with a validly published and correct name: 0 Number of child taxa with a validly published name, including synonyms: 4 Total number of child taxa: 5