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).
Nostocales Cavalier-Smith 2002, ord. nov. (Type order of the class ¤ Hormogoneae Cavalier-Smith 2002).
Type genus: "Nostoc" Vaucher 1803.
Etymology: N.L. n. "Nostoc", type genus of the order; suff. -ales, ending denoting an order; N.L. fem. pl. n. Nostocales, the "Nostoc" order.
Valid 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.
Original article in IJSEM Online
Note: The type genus "Nostoc" does not appear on the Approved Lists of Bacterial Names, and has not been validly published since 1 January 1980. Consequently, Nostocales Cavalier-Smith 2002 is illegitimate.