Complete chloroplast genome of the diatom Skeletonema pseudocostatum from the western mediterranean coast of AlgeriaChahinez Hamedi1, Romain Gastineau2, Claude Lemieux3, Monique Turmel3, Andrzej Witkowski2 and Mohammed Bey Baba Hamed4

1 Laboratoire d’Aquaculture et Bioremédiation (AquaBior) Université Oran 1 Ahmed Ben Bella Oran, Algeria;

2 Palaeoceanology Unit, Faculty of Geosciences, University of Szczecin, Al. Papieża Jana Pawła II 22a 70-453 Szczecin, Poland;

3 Département de biochimie, de microbiologie et de bio-informatique, Institut de Biologie Intégrative et des Systèmes, Université Laval, Québec, Canada and

4 Laboratoire d’Aquaculture et Bioremédiation (AquaBior) Ecole Supérieure en Sciences Biologiques d’Oran (ESSBO). BP 1042 Saim Mohamed (EX-IAP) 31003 Oran, Algeria


The diatom species representing Skeletonema pseudocostatum (Mediophyceae, Thalassiosirales) was isolated from the Western Mediterranean coast of Algeria and grown successfully. Total cellular DNA was extracted from a scaled-up culture and used for sequencing the plastid genome. The Skeletonema pseudocostatum genome is 127,013 bp long and contains an inverted repeat region of 18,240 bp. The order of genes on the inverted repeat was found to be highly conserved when compared with the plastid genomes of other Thalassiosirales. As expected, the maximum likelihood phylogeny we inferred from multiple plastid genes placed Skeletonema pseudocostatum within the Thalassiosirales. This diatom plastid genome is the first made available for the cosmopolitan and ecologically important genus Skeletonema.