(Alphaproteobacteria) (Alphaproteobacteria) is a biological class of the kingdom Bacteria and phylum Proteobacteria.
Caulobacterales
Kiloniellales
Kordiimonadales
Parvularculales
Rhizobiales
Rhodobacterales
Rhodospirillales
Rickettsiales
Sneathiellales
Sphingomonadales
Alphaproteobacteria
Betaproteobacteria
Deltaproteobacteria
Epsilonproteobacteria
Gammaproteobacteria
Zetaproteobacteria