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Myroides fluvii sp. nov., isolated from the Han River, Republic of Korea.

A Gram-stain-negative, aerobic, short rod-shaped, pale yellow-pigmented, non-motile and gentamycin-resistant bacterial strain designated CJ210T was isolated from the Han River, Republic of Korea. Strain CJ210T grew optimally at 30 °C and pH 7.0 in the absence of NaCl on tryptic soy agar. Flexirubin-type pigments were not produced. Phylogenetic analysis based on 16S rRNA gene sequence similarity showed that strain CJ210T belonged to the genus Myroides within the family Flavobacteriaceae and was most closely related to Myroides odoratus KACC 14347T (98.1 % similarity), followed by M. injenensis KCTC 23367T (95.3 % similarity). The average nucleotide identity values between strain CJ210T and two closely related type strains M. odoratus KACC 14347T and M. injenensis KCTC 23367T were 83.7 and 73.8 %, respectively. The digital DNA-DNA hybridization results between strain CJ210T and the related type strains were 27.5 and 20.2 %, respectively. Strain CJ210T contained menaquinone 6 (MK-6) as the predominant menaquinone. The predominant polar lipids were phosphatidylethanolamine, two unidentified aminolipids and two unidentified lipids. The major fatty acids of strain CJ210T were iso-C15 : 0, iso-C17 : 0 3-OH and summed feature 9 (comprising iso-C17 : 1  ω9c and/or C16 : 0 10-methyl). Whole genome sequencing revealed that strain CJ210T had a genome of 3.8 Mbp with 36.5 % DNA G+C content. The genome contained several antimicrobial resistance genes including an aminoglycoside-resistant gene. On the basis of the polyphasic taxonomic study, strain CJ210T represents a novel species in the genus Myroides, for which name Myrodies fluvii sp. nov. is proposed. The type strain is CJ210T (=KACC 19954T=JCM 33306T).