RT Journal Article SR Electronic(1) A1 Lee, On On A1 Lai, Pok Yui A1 Wu, Hui-xian A1 Zhou, Xiao-jian A1 Miao, Li A1 Wang, Hao A1 Qian, Pei-YuanYR 2012 T1 Marinobacter xestospongiae sp. nov., isolated from the marine sponge Xestospongia testudinaria collected from the Red Sea JF International Journal of Systematic and Evolutionary Microbiology, VO 62 IS Pt_8 SP 1980 OP 1985 DO https://doi.org/10.1099/ijs.0.028811-0 PB Microbiology Society, SN 1466-5034, AB A Gram-negative, catalase- and oxidase-positive, non-sporulating, rod-shaped and slightly halophilic bacterial strain, designated UST090418-1611T, was isolated from the marine sponge Xestospongia testudinaria collected from the Red Sea coast of Saudi Arabia. Phylogenetic trees based on the 16S rRNA gene sequence placed strain UST090418-1611T in the family Alteromonadaceae with the closest relationship to the genus Marinobacter . The 16S rRNA gene sequence similarity between the strain and the type strains of recognized Marinobacter species ranged from 92.9 to 98.3 %. Although strain UST090418-1611T shared high 16S rRNA gene sequence similarity with Marinobacter mobilis CN46T, M. zhejiangensis CN74T and M. sediminum R65T (98.3, 97.4 and 97.3 %, respectively), the relatedness of the strain to these three strains in DNA–DNA hybridization was only 58, 56 and 33 %, respectively, supporting the novelty of the strain. In contrast to most strains in the genus Marinobacter , strain UST090418-1611T tolerated only 6 % (w/v) NaCl, and optimal growth occurred at 2.0 % (w/v) NaCl, pH 7.0–8.0 and 28–36 °C. The predominant cellular fatty acids were C12 : 0 3-OH, C16 : 0, C12 : 0 and summed feature 3 (C16 : 1ω6c and/or C16 : 1ω7c). The genomic DNA G+C content was 57.1 mol%. Based on the physiological, phylogenetic and chemotaxonomic characteristics presented in this study, we suggest that the strain represents a novel species in the genus Marinobacter , for which the name Marinobacter xestospongiae sp. nov. is proposed, with UST090418-1611T ( = JCM 17469T  = NRRL B-59512T) as the type strain., UL https://www.microbiologyresearch.org/content/journal/ijsem/10.1099/ijs.0.028811-0