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A polyphasic taxonomic approach was used to study strain 12116(T), which was isolated from desert sand in Xinjiang, China. Cells of the isolate were Gram-negative, non-motile, rod-shaped and aerobic. MK-7 was the predominant respiratory menaquinone. The DNA G + C content was 46.3 mol%. A phylogenetic analysis based on 16S rRNA gene sequences showed that the isolate was most closely related to the members of the genus Dyadobacter, with similarities ranging from 94.7 to 96.6%. Therefore, on the basis of genotypic and phenotypic data, strain 12116(T) represents a novel species of the genus Dyadobacter, for which the name Dyadobacter alkalitolerans sp. nov. is proposed. The type strain is 12116(T) (=CCTCC AB 207176(T) =NRRL B-51268(T)).