The Sphingomonadales are an order of the Alphaproteobacteria.

[1] The currently accepted taxonomy is based on the List of Prokaryotic names with Standing in Nomenclature[2] and the phylogeny is based on whole-genome sequences.

[3] Sphingosinicellaceae Zymomonadaceae Sphingomonadaceae Erythrobacteraceae Rhodospirillales

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