Order Halobacteriales

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).


Halobacteriales Grant and Larsen 1989, ord. nov. (Type order of the class ¤ Halomebacteria Cavalier-Smith 2002; type order of the class ¤ Halobacteria Grant et al. 2002).
Type genus: ¤ Halobacterium Elazari-Volcani 1957 (Approved Lists 1980).
Etymology: N.L. neut. n. Halobacterium, type genus of the order; suff. -ales, ending denoting an order; N.L. fem. pl. n. Halobacteriales, the Halobacterium order.
Valid publication: Validation List no. 31. Int. J. Syst. Bacteriol., 1989, 39, 495-497.
Effective publication: GRANT (W.D.) and LARSEN (H.): Group III. Extremely halophilic archaeobacteria. Order Halobacteriales ord. nov. In: J.T. STALEY, M.P. BRYANT, N. PFENNIG and J.G. HOLT (editors), Bergey's Manual of Systematic Bacteriology, first edition, vol. 3, The Williams & Wilkins Co., Baltimore, 1989, pp. 2216-2218.
Validation List no. 31 in IJSEM Online

1 On the Validation List no. 31, in violation of Rules 15 and 21a, the nomenclatural type is given as Halobacteriaceae Gibbons 1974 (Approved Lists 1980). It should be noted that the correct nomenclatural type is cited in the effective publication.
1 EUZÉBY (J.P.) and TINDALL (B.J.): Nomenclatural type of orders: corrections necessary according to Rules 15 and 21a of the Bacteriological Code (1990 Revision) and designation of appropriate nomenclatural types of classes and subclasses. Request for an Opinion. Int. J. Syst. Evol. Microbiol. 2001, 51, 725-727.
Request for an Opinion in IJSEM Online
2 JUDICIAL COMMISSION OF THE INTERNATIONAL COMMITTEE ON SYSTEMATICS OF PROKARYOTES: The nomenclatural types of the orders Acholeplasmatales, Halanaerobiales, Halobacteriales, Methanobacteriales, Methanococcales, Methanomicrobiales, Planctomycetales, Prochlorales, Sulfolobales, Thermococcales, Thermoproteales and Verrucomicrobiales are the genera Acholeplasma, Halanaerobium, Halobacterium, Methanobacterium, Methanococcus, Methanomicrobium, Planctomyces, Prochloron, Sulfolobus, Thermococcus, Thermoproteus and Verrucomicrobium, respectively. Opinion 79. Int. J. Syst. Evol. Microbiol., 2005, 55, 517-518.
Opinion 79 in IJSEM Online
2 P. DasSarma & S. DasSarma 2008 [1], propose to rename the order Halobacteriales as "Haloarchaeales", to reflect its membership in the archaeal rather than the bacterial domain. This change is in violation of the General Considerations, Principles and Rules of the International Code of Nomenclature of Bacteria [2], and it not validly published.
1 DASSARMA (P.) and DASSARMA (S.): On the origin of prokaryotic "species": the taxonomy of halophilic Archaea. Saline Systems, 2008, 4, 5.
Original publication Online
2 OREN (A.): Nomenclature and taxonomy of halophilic archaea - comments on the proposal by DasSarma and DasSarma for nomenclatural changes within the order Halobacteriales. Int. J. Syst. Evol. Microbiol., 2008, 58, 2245-2246.
Original article in IJSEM Online