Authorship

SN2000 author citation	:			T. Cavalier-Smith, 2002, nom. prok., typ. bot., nom. rej.
Original name, rank & spelling	:			Cavalier-Smith, T. 2002a. Int. J. Syst. Evol. Microbiol. 52: tbl. 1 (p. 11: "ord. nov.").
Original use as a prokaryotic name	:			op. cit.: tbl. 1 (p. 10: "The five traditional cyanobacterial orders, already valid under the Code of Botanical Nomenclature, are here also formally validated under the Bacteriological (=Prokaryotic) Code").
Description/Diagnosis in English	:			op. cit.: tbl. 1 (p. 11: "Description").

Etymology

Derived from

:

Nostoc (Genus) Vaucher ex Bornet and Flahault 1886 nom. inval.

Ref: T. Cavalier-Smith, 2002a: tbl. 1 (p. 11). [new]

Attributes

Prokaryotic name (: nom. prok.) [ICNB/ICNP]				Ref: T. Cavalier-Smith, 2002a. Int. J. Syst. Evol. Microbiol. 52: tbl. 1 (p. 10: "Prokaryotic"). [new]
Validly published name under the ICNP [ICNP, 2022: App. 7 (IJSEM)]				Ref: LPSN, 2020-present. LPSN: [1 Dec 2025].
Type genus: validly publ. under ICN (nom. illeg.: typ. bot.) [ICNP, 2022: Rules 21a, 27(3) (Cyanobact.; <=order; <2021)]				Ref: LPSN, 2020-present. LPSN: [1 Dec 2025] ("illegitimate").
Rejected name (nom. rej.) [ICNP, 2019: Rule 56a]				Ref: B.J. Tindall, 2014. Int. J. Syst. Evol. Microbiol. 64 (10): 3600. [new]
Rejected name (nom. rej.) [ICNP, 2019: Rule 56a]				Ref: C.T. Parker et al. (eds.), 2019. Int. J. Syst. Evol. Microbiol. 69 (1A): App. 4 List 7 (p. S57) (Opinion 79 (suppl.)).

Types

Type, by original designation, of	:	Hormogoneae (Class) Cavalier-Smith 2002 nom. illeg., nom. rej.		Ref: T. Cavalier-Smith, 2002a: tbl. 1 (p. 11). [new]
Type, by original designation	:	Nostoc (Genus) Vaucher ex Bornet and Flahault 1886 nom. inval.		Ref: T. Cavalier-Smith, 2002a: tbl. 1 (p. 11). [new]

Variants

Name in original code of nomenclature	:	Nostocales (Order) Borzì (1914)
Name in current code of nomenclature	:	Nostocales (Order) Borzì (1914)		Ref: J. Komárek & T. Hauer, 2004-present: 29 Sep 2007. [inferred]

Synonyms

Isonym of	:	Nostocales (Order) corrig. Borzì 1914		Ref: LPSN, 2020-present: [18 Jan 2026] ("homotypic").
Including	:	Stigonematales (Order) (ex Geitler 1925) Cavalier-Smith 2002 nom. illeg., nom. rej.