Order Thermococcales

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).


Thermococcales Zillig 1988, ord. nov. (Type order of the class ¤ Protoarchaea Cavalier-Smith 2002; type order of the class ¤ Thermococci Zillig and Reysenbach 2002).
Type genus: ¤ Thermococcus Zillig 1983.
Etymology: N.L. masc. n. Thermococcus, type genus of the order; suff. -ales, ending denoting an order; N.L. fem. pl. n. Thermococcales, the Thermococcus order.
Valid publication: Validation List no. 24. Int. J. Syst. Bacteriol., 1988, 38, 136-137.
Effective publication: ZILLIG (W.), HOLZ (I.), KLENK (H.P.), TRENT (J.), WUNDERL (S.), JANEKOVIC (D.), IMSEL (E.) and HAAS (B.): Pyrococcus woesei, sp. nov., an ultra-thermophilic marine Archaebacterium, representing a novel order, Thermococcales. Syst. Appl. Microbiol., 1987, 9, 62-70.
Validation List no. 24 in IJSEM Online - Effective publication Online

1 On the Validation List no. 24, in violation of Rules 15 and 21a, the nomenclatural type is given as Thermococcaceae Zillig 1988.
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 The name Thermococcales must be attributed to Zillig 1988 (in Zillig, Holz, Klenk, Trent, Wunderl, Janekovic, Imsel and Hass 1987) not to Zillig et al. 1988 as cited in Validation List no. 24.
Reference: ZILLIG (W.) and REYSENBACH (A.L.): Order I. Thermococcales Zillig 1988, 136VP (Effective publication Zillig in Zillig, Holz, Klenk, Trent, Wunderl, Janekovic, Imsel and Hass 1987, 69). In: D.R. BOONE, R.W. CASTENHOLZ and G.M. GARRITY (editors): Bergey's Manual of Systematic Bacteriology, second edition, vol. 1 (The Archaea and the deeply branching and phototrophic Bacteria), Springer-Verlag, New York, 2001, p. 341.