ATCC BAA-115 = CIP 105757 = DSM 21817 = HAMBI 2409 = LMG 18254 = SO2 = SO2 (The type strain has been deposited in the USDA ARS National Rhizobium Resource Center collection, USA, and in the Culture Collection of Centro de Investigación sobre Fijación de Nitrógeno at UNAM, Cuernavaca, Mexico. Accession numbers not given.)