Rhizobium Frank, 1889 Dataset Integrated Taxonomic Information System (ITIS) Rank GENUS Classification kingdom Bacteria phylum Proteobacteria class Alphaproteobacteria order Rhizobiales family Rhizobiaceae genus Rhizobium Name Synonyms Agrobacterium Conn, 1942 Allorhizobium de Lajudie et al., 1998 Homonyms Rhizobium Frank, 1889