Arcobacter roscoffensis sp. nov., a marine bacterium isolated from coastal seawater.

A novel Gram-negative, aerobic, motile, rod-shaped, beige-pigmented bacterium, strain ARW1-2F2 ^T , was isolated from a seawater sample collected from Roscoff, France. Strain ARW1-2F2 ^T was catalase-negative and oxidase-positive, and grew under mesophilic, neutrophilic and halophilic conditions. The 16S rRNA sequences revealed that strain ARW1-2F2 ^T was closely related to Arcobacter lekithochrous LFT 1.7 ^T and Arcobacter caeni RW17-10 ^T (95.8 and 95.5 % gene sequence similarity, respectively). The genome of strain ARW1-2F2 ^T was sequenced and had a G+C content of 28.7%. Two different measures of genome similarity, average nucleotide identity based on blast and digital DNA-DNA hybridization, indicated that strain ARW1-2F2 ^T represents a new Arcobacter species. The predominant fatty acids were C _16 : 1 ω7 c /C _16 : 1 ω6 c and C _18 : 1 ω7 c /C _18 : 1 ω6 c . The results of a polyphasic analysis supported the description of strain ARW1-2F2 ^T as representing a novel species of the genus Arcobacter , for which the name Arcobacter roscoffensis sp. nov. is proposed with the type strain ARW1-2F2 ^T (DSM 29169 ^T =KCTC 52423 ^T ).