Class Gammaproteobacteria

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).


Gammaproteobacteria Garrity et al. 2005, class. nov.
Type order: ¤ Pseudomonadales Orla-Jensen 1921 (Approved Lists 1980).
Etymology: Gr. n. gamma, name of the third letter of Greek alphabet; Gr. or L. n. Proteus, Greek god of the sea, capable of assuming many different shapes; N.L. n. bacter, rod; suff. -ia, ending to denote a class; N.L. neut. pl. n. Gammaproteobacteria, a class of bacteria included in the phylum "Proteobacteria" and having 16S rRNA gene sequences related to those of the members of the order Pseudomonadales.
Valid publication: Validation List no. 106. Int. J. Syst. Evol. Microbiol., 2005, 55, 2235-2238.
Effective publication: GARRITY (G.M.), BELL (J.A.) and LILBURN (T.): Class III. Gammaproteobacteria class. nov. In: D.J. BRENNER, N.R. KRIEG, J.T. STALEY and G. M. GARRITY (editors), Bergey's Manual of Systematic Bacteriology, second edition, vol. 2 (The Proteobacteria), part B (The Gammaproteobacteria), Springer, New York, 2005, p. 1.
Validation List no. 106 in IJSEM Online

Gammaproteobacteria Garrity et al. 2005 emend. Williams and Kelly 2013.
Reference: WILLIAMS, K. P. and KELLY, D. P. 2013. Proposal for a new class within the phylum Proteobacteria, Acidithiobacillia classis nov., with the type order Acidithiobacillales, and emended description of the class Gammaproteobacteria. Int. J. Syst. Evol. Microbiol., 63, 2901-2906.
Original article in IJSEM Online