Order Methanococcales

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).


Methanococcales Balch and Wolfe 1981, ord. nov. (Type order of the class ¤ Methanothermea Cavalier-Smith 2002; type order of the class ¤ Methanococci Boone 2002).
Type genus: ¤ Methanococcus Kluyver and van Niel 1936 emend. Barker 1936 (Approved Lists 1980).
Etymology: N.L. masc. n. Methanococcus, type genus of the order; suff. -ales, ending denoting an order; N.L. fem. pl. n. Methanococcales, the Methanococcus order.
Valid publication: Validation List no. 6. Int. J. Syst. Bacteriol., 1981, 31, 215-218.
Effective publication: BALCH (W.E.), FOX (G.E.), MAGRUM (L.J.), WOESE (C.R.) and WOLFE (R.S.): Methanogens: reevaluation of a unique biological group. Microbiol. Rev., 1979, 43, 260-296.
Validation List no. 6 in IJSEM Online - Effective publication Online

Note: On the Validation List no. 6, in violation of Rules 15 and 21a, the nomenclatural type is given as Methanococcaceae Balch and Wolfe 1981.
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