sp. nov., a marine alphaproteobacterium isolated from mangrove sediment in Thailand.

Two bacterial strains, designated as 1-4-3 and 1-4-4, were isolated from a mangrove sediment cultured with coastal seawater. The cells were Gram-stain-negative, motile, short, rod-shaped bacteria with flagella. Growth occurred at 4-37 °C, pH 7.0-9.0, and 0-7% NaCl. The predominant fatty acids of the novel strains were C c, C cyclo 8c, C, and C. A phylogenetic analysis based on 16S rRNA gene sequences and whole genome phylogeny analysis based on distance matrix revealed an affiliation between the two strains and the genus , with closest sequence similarity to 4M3-2 (96.41 and 96.64% similarity, respectively) and (96.01 and 96.23% similarity, respectively). The DNA G+C content of strain 1-4-3 was 66.80 mol%. Strain 1-4-3 displayed low DNA-DNA relatedness to 4M3-2, with an average nucleotide identity value of 77.47 % and digital DNA-DNA hybridization value of 22.83 %. Genotypic, chemotaxonomic, and phenotypic data indicate that strains 1-4-3 and 1-4-4 represent a novel species of the genus , for which we propose the name sp. nov. The type strain is 1-4-3 (=LMG 31693=CGMCC 1.18507).