sp. nov., sp. nov. and sp. nov., isolated from glaciers.

Three Gram-stain-negative, rod-shaped, motile bacterial strains, each with a single polar flagellum, designated LB3P38, LT1P18 and ZB1P45, were isolated from glacier samples on the Tibetan Plateau, P.R. China. These strains grew at temperatures ranging from -2 to 32 °C (optimum 25-30 °C) and at pH values of 5.0-11.0 (optimum pH 7.0). The similarities of 16S rRNA gene sequences among these strains ranged from 99.67% to 99.93%. Phylogenetic analysis based on 16S rRNA gene sequences confirmed their affiliation with the genus . Phylogenomic analysis positioned these strains in close relation to PMCC 200367 and LMG 19851. Average nucleotide identity values and digital DNA-DNA hybridization values between these strains and other type strains of the genus were below 94.6% and 63.4%, respectively. The predominant fatty acids identified in these strains were C, C cyclo and summed feature 3 (C c and/or C c). Based on the combined phenotypic and phylogenetic evidence, each strain is proposed to represent a novel species within the genus , with the names sp. nov. (type strain=LB3 P38=CGMCC 1.11284=JCM 37126), sp. nov. (type strain=LT1 P18=CGMCC 1.11310=JCM 37131) and sp. nov. (type strain=ZB1 P45=CGMCC 1.23235=JCM 37141) proposed.