AlphaproteobacteriaHyphomicrobialesSphingomonadalesRickettsialesRhodospirillalesCaulobacteralesRhodobacteralesCandidatus PelagibacteralesKordiimonadalesGeminicoccalesHyphomonadalesSneathiellalesMagnetococcalesParvularculalesHolosporalesMicropepsalesMaricaulalesEmcibacteralesRhodothalassialesunclassified AlphaproteobacteriaMinwuialesCandidatus PuniceispirillalesAlphaproteobacteria incertae sedisIodidimonadales