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Three novel strains, designated LB3P45T, LS2P90T and ZS1P70T, were isolated from glaciers located on the Tibetan Plateau, PR China. These strains were Gram-stain-negative, aerobic, rod-shaped and yellow or orange coloured. Phylogenetic analysis based on the 16S rRNA gene and genomic sequences indicated that they belong to the genus Flavobacterium. The 16S rRNA gene sequence similarity among the three strains ranged from 97.4 to 98.6%. Strain LB3P45T showed 98.9% and 98.7% similarity to Flavobacterium urumqiense CGMCC 1.9230T and Flavobacterium xinjiangense JCM 11314T, respectively. Strain LS2P90T displayed 99.0% and 98.7% similarity to F. xinjiangense JCM 11314T and F. urumqiense CGMCC 1.9230T. Strain ZS1P70T had the highest sequence similarity with F. xinjiangense JCM 11314T (98.0%) and F. urumqiense CGMCC 1.9230T (97.8%). The average nucleotide identity and digital DNA–DNA hybridization values between these strains and their closest relatives were lower than 93.0% and 47.9%, respectively. All three strains contained summed feature 3 (comprising C16:1 ω7c and/or C16:1 ω6c) as the major fatty acids. Based on phenotypic characteristics, phylogenetic analysis and genotypic data, the three novel species are proposed: Flavobacterium fructosi sp. nov. (LB3P45T=CGMCC 1.11439T=NBRC 114819T), Flavobacterium xylosi sp. nov. (LS2P90T=CGMCC 1.11685T=NBRC 114823T) and Flavobacterium zhouii sp. nov. (ZS1P70T=CGMCC 1.24124T=NBRC 114829T).