Robiginitalea marina sp. nov., isolated from coastal sediment

A Gram-stain-negative, orange, aerobic, non-motile, rod-shaped marine bacterium, designated as 2V75^T, was isolated from the coastal sediment of Xiaoshi Island, Weihai, China. The strain 2V75^T grew at 20-45 °C (optimum, 37 °C), from pH 7.0 to 9.0 (optimum, pH 7.0) and in the presence of 0.5-5% (w/v) NaCl (optimum, 3%). Phylogenetic analysis based on 16S rRNA gene sequence indicated that strain 2V75^T was affiliated to the genus Robiginitalea and had the highest sequence similarity with R. biformata KCTC 12146^T (93.7%). The ANI values between strain 2V75^T and R. biformata KCTC 12146^T were 72.6%, respectively. The DNA G + C content was 54.8 mol%. MK-6 was the only respiratory quinone. Based on the phenotypic, phylogenetic and chemotaxonomic data, strain 2V75^T should be classified as a novel species in the genus Robiginitalea, for which the name Robiginitalea marina is proposed. The type strain is 2V75^T (= KCTC 92035^T = MCCC 1H00484^T).