Chitinimonas naiadis sp. nov., Isolated from a Freshwater River.

A rod shaped, aerobic, Gram-stain-negative, and motile bacterium, strain AR2T , was isolated from a water sample of Yeongsan river, Republic of Korea. Strain AR2T clustered closely with the members of the genus Chitinimonas and showed the highest 16S rRNA gene sequence similarity with Chitinimonas prasina LY03T (96.4%), Chitinimonas viridis HMD2169T (96.4%), Chitinimonas taiwanensis cfT (96.2%), and Chitinimonas koreensis R2A43-10T (94.2%). The predominant fatty acids of strain AR2T were identified to be summed feature 3 (comprising C16:1 ω7c and/or C16:1 ω6c ), C16:0 , and C10:0 3-OH. Diphosphatidylglycerol, phosphatidylglycerol, and phosphatidylethanolamine were found to be the major polar lipids. The genomic DNA G+C content was 60.4 mol%. Based on the polyphasic characterization, the isolated strain AR2T is described as a representative of a novel species in the genus Chitinimonas , for which the name Chitinimonas naiadis sp. nov. (type strain =AR2T =KCTC 42755T =JCM 31504T ) is proposed.