The results of phylogenetic analyses of the genera Aliiroseovarius Park et al. 2015 and Pseudoroseovarius Sun et al. 2015 and comparison of the phenotypic features of their members showed that these genera should be united. Based on nomenclatural priority of the genus Aliiroseovarius, it is proposed to reclassify Pseudoroseovarius crassostreae as a later homotypic synonym of Aliiroseovarius crassostreae, Pseudoroseovarius halocynthiae as a later homotypic synonym of Aliiroseovarius halocynthiae, Pseudoroseovarius sediminilitoris as a later homotypic synonym of Aliiroseovarius sediminilitoris and Pseudoroseovarius zhejiangensis as Aliiroseovarius zhejiangensis comb. nov.