DNA–DNA hybridization experiments and an evaluation of phenotypic characteristics, DNA base ratios and 16S rRNA gene sequences demonstrated that Wautersia eutropha (Davies 1969) Vaneechoutte et al. 2004 , the type species of the genus Wautersia, is a later synonym of Cupriavidus necator Makkar and Casida 1987 , the type species of the genus Cupriavidus. In conformity with Rules 15, 17, 23a and 37a(1) of the International Code of Nomenclature of Bacteria, the genus name Cupriavidus has priority over the genus name Wautersia, and all other members of the genus Wautersia are reclassified into Cupriavidus as Cupriavidus basilensis comb. nov. (type strain LMG 18990T=DSM 11853T), Cupriavidus campinensis comb. nov. (type strain LMG 19282T=CCUG 44526T), Cupriavidus gilardii comb. nov. (type strain LMG 5886T=CCUG 38401T), Cupriavidus metallidurans comb. nov. (type strain LMG 1195T=DSM 2839T), Cupriavidus oxalaticus comb. nov. (type strain LMG 2235T=CCUG 2086T=DSM 1105T), Cupriavidus pauculus comb. nov. (type strain LMG 3244T=CCUG 12507T), Cupriavidus respiraculi comb. nov. (type strain LMG 21510T=CCUG 46809T) and Cupriavidus taiwanensis comb. nov. (type strain LMG 19424T=CCUG 44338T).