Caulobacterales Henrici and Johnson 1935 (Approved Lists 1980)
Emcibacterales Iino et al. 2016
Holosporales Szokoli et al. 2020
Hyphomicrobiales Douglas 1957 (Approved Lists 1980)
Iodidimonadales Iino et al. 2016
Kordiimonadales Kwon et al. 2005
Micropepsales Harbison et al. 2017
Parvularculales Garrity et al. 2003
Rhodobacterales Garrity et al. 2006
Rhodospirillales Pfennig and Trüper 1971 (Approved Lists 1980)
Rhodothalassiales Venkata Ramana et al. 2014
Sneathiellales Kurahashi et al. 2008
Sphingomonadales Yabuuchi and Kosako 2006
"Taxa" incertae sedis (see text)
Synonyms[3]
Caulobacteria Cavalier-Smith 2020
Anoxyphotobacteria (Gibbons and Murray 1978) Murray 1988
Photobacteria Gibbons and Murray 1978 (Approved Lists 1980)
Alphabacteria Cavalier-Smith 2002
Alphaproteobacteria is a class of bacteria in the phylum Pseudomonadota (formerly "Proteobacteria").[4] The Magnetococcales and Mariprofundales are considered basal or sister to the Alphaproteobacteria.[5][6] The Alphaproteobacteria are highly diverse and possess few commonalities, but nevertheless share a common ancestor. Like all Proteobacteria, its members are gram-negative, although some of its intracellular parasitic members lack peptidoglycan and are consequently gram variable.[4][3]
^ abcFerla MP, Thrash JC, Giovannoni SJ, Patrick WM (2013). "New rRNA gene-based phylogenies of the Alphaproteobacteria provide perspective on major groups, mitochondrial ancestry and phylogenetic instability". PLOS ONE. 8 (12): e83383. Bibcode:2013PLoSO...883383F. doi:10.1371/journal.pone.0083383. PMC 3859672. PMID 24349502.
^Grote J, Thrash JC, Huggett MJ, Landry ZC, Carini P, Giovannoni SJ, Rappé MS (2012). "Streamlining and core genome conservation among highly divergent members of the SAR11 clade". mBio. 3 (5): e00252-12. doi:10.1128/mBio.00252-12. PMC 3448164. PMID 22991429.
^ abcEuzéby JP, Parte AC. "Alphaproteobacteria". List of Prokaryotic names with Standing in Nomenclature (LPSN). Retrieved May 31, 2021.
^ abBrenner DJ, Krieg NR, Staley T (July 26, 2005) [1984(Williams & Wilkins)]. Garrity GM (ed.). The Proteobacteria. Bergey's Manual of Systematic Bacteriology. Vol. 2C (2nd ed.). New York: Springer. p. 1388. ISBN 978-0-387-24145-6. British Library no. GBA561951.
^Cite error: The named reference :0 was invoked but never defined (see the help page).
^Cite error: The named reference Hördt was invoked but never defined (see the help page).
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