Project description:The complete plastid genome of Scytosiphon lomentaria was determined in this study. The circular genome was 139,208?bp in length with the GC content of 31.3%. It contained 137 protein-coding genes (PCGs), 27 transfer RNA (tRNA) genes, and 8 ribosome RNA (rRNA) genes. A phylogenetic analysis based on the plastid genomes of Phaeophyceae indicated that S. lomentaria is located in the Ectocarpales lineage, being closely related to Endarachne binghamiae.