Three Gram-stain-positive bacterial strains, designated X0750 , X0278 and X0401, isolated from traditional yogurt in Tibet Autonomous Region, PR China, were characterized by a polyphasic approach, including sequence analyses of the 16S rRNA gene and three housekeeping genes ( , and ), determination of average nucleotide identity (ANI) and average amino acid identity (AAI), DNA-DNA hybridization ( DDH), fatty acid methyl ester (FAME) analysis and phenotypic characterization. Strain X0750 was phylogenetically related to the type strains of , , , , , , and , having 94.4-100 % 16S rRNA gene sequence similarities, 76.7-90.0 %  gene sequence similarities, 88.9-99.4 %  gene sequence similarities and 77.6-92.8 %  gene sequence similarities, respectively. ANI, DDH and AAI values between strain X0750 and type strains of phylogenetically related species were less than 90.4, 40.9 and 92.8 % respectively, confirming that strain X0750 represents a novel species within the genus . Based upon the data obtained in the present study, a novel species, sp. nov., is proposed and the type strain is X0750 (=NCIMB 15192 =CCM 8924 =LMG 31184 =CCTCC AB 2018403 ).