Rhodospirillales Pfennig and Truper 1971 (Approved Lists 1980) emend. Hordt et al. 2020 Dataset NCBI Taxonomy Classification phylum Pseudomonadota class Alphaproteobacteria order Rhodospirillales Name Homonyms Rhodospirillales Rhodospirillales Pfennig and Truper 1971 (Approved Lists 1980) Rhodospirillales Pfennig and Truper 1971 (Approved Lists 1980) emend. Hordt et al. 2020