Complete chloroplast genome of the tiny marine diatom (Bacillariophyta) from the Adriatic Sea.

We report the chloroplast genome sequence of , a tiny araphid pennate diatom collected from the Adriatic Sea. The 160,994-bp . genome displays a quadripartite structure and its gene repertoire resembles those of other diatom chloroplast genomes. Besides the genes located in the inverted repeat, is duplicated. A gene-poor region in the large single-copy region contains multiple ORFs sharing sequence similarities with plasmids and chloroplast ORFs found in other diatom species. The genome features a single intron, a group II intron in . Phylogenomic analysis identified at a basal position within the araphid 2 clade.