Gr. alpha, the letter a; N.L. masc. n.bacter, a small rod; Gr. fem. adj. suff.-ia, ending to denote a class; N.L. neut. pl. n.Alphabacteria, name proposed to formalize the earlier informal designation as α-proteobacteria
heterotypic synonym, validly published, illegitimate name
Cavalier-Smith (2002) assigned this class to the subphylum "Rhodobacteria" Cavalier-Smith 2002.Publication:
Cavalier-Smith T. The neomuran origin of archaebacteria, the negibacterial root of the universal tree and bacterial megaclassification. Int J Syst Evol Microbiol 2002; 52:7-76.
The type order of this class has been placed in the class Alphaproteobacteria Garrity et al. 2006.Publication:
Garrity GM, Bell JA, Lilburn T. Class I. Alphaproteobacteria class. nov. In: Brenner DJ, Krieg NR, Staley JT, Garrity GM (eds), Bergey's Manual of Systematic Bacteriology, 2nd edn, vol. 2 (The Proteobacteria), part C (The Alpha-, Beta-, Delta-, and Epsilonproteobacteria), Springer, New York, 2005, p. 1.
The type order of this class has alternatively been placed in the class Microtatobiotes Philip 1956 (Approved Lists 1980).Publication:
Parker CD. Genus V. Thiobacillus Beijerinck 1904. In: Breed RS, Murray EGD, Smith NR (eds), Bergey's Manual of Determinative Bacteriology, 7th edition, The Williams & Wilkins Co, Baltimore, 1957, p. 83-88.
The type order of this class has alternatively been placed in the class Schizomycetes Nägeli 1857 (Approved Lists 1980).Publication:
Burkholder WH. Genus I. Pseudomonas Migula. Bacterial plant pathogens. In: Breed RS, Murray EGD, Hitchens AP (eds), Bergey's Manual of Determinative Bacteriology, 6th ed., The Williams & Wilkins Co, Baltimore, 1948, p. 82-150.
Type order classified in the class Alphaproteobacteria. Rejected Name (Judicial Commission, Opinion 79 suppl.; IJSEM 64: 3599–3602).Publication:
Tindall BJ. Names at the rank of class, subclass and order, their typification and current status: Supplementary information to Opinion 79. Judicial Commission of the International Committee on Systematics of Prokaryotes. Int J Syst Evol Microbiol 2014; 64:3599-3602.
Irregularly formed name (not formed from the stem of the name of the nomenclatural type). Alphabacteria was previously known as "Alphabacteria" Cavalier-Smith 1992.
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