Shewanella marina sp nov., isolated from seawater

A motile, rod-shaped, pale-brown-pigmented bacterium, designated strain C4(T), was isolated from seawater collected from the South Sea (Republic of Korea). Cells were Gram-negative, facultatively anaerobic, and catalase- and oxidase-positive. The major fatty acids were summed feature 3 (C-16:1 omega 7c and/or iso-C-15:0 2-OH; 19.4%), C-16:0 (16.3%), C-17:1 omega 8c (9.5%) and iso-C-15:0 (7.7%). The DNA G + C content was 40.8 mol%. A phylogenetic tree based on 16S rRNA gene sequences showed that strain C4T formed a lineage within the genus Shewanella (92.7-96.1% sequence similarity to representative strains of the genus Shewanella) and was part of a distinct branch with the clade comprising Shewanella haliotis DWO1(T) and Shewanella algae ATCC 51192(T). Phenotypic characteristics enabled strain C4(T) to be distinguished from S. haliotis and S. algae. On the basis of the data presented in this study, strain C4(T) represents a novel species, for which the name Shewanella marina sp. nov. is proposed. The type strain is C4(T) (=KCTC 22185(T)=JCM 15074(T)).