Rhodospirillum Molisch, 1907 emend. Imhoff et al., 1998 Dataset Catalogue of Life Rank GENUS Classification kingdom Bacteria phylum Proteobacteria class Alphaproteobacteria order Rhodospirillales family Rhodospirillaceae genus Rhodospirillum Name Homonyms Rhodospirillum Molisch, 1907 emend. Imhoff et al., 1998