Complete mitochondrial genome of the brown alga Scytosiphon lomentaria ( Scytosiphonaceae, Phaeophyceae)

We determined the complete mitochondrial genome of Scytosiphon lomentaria (Lyngbye) Link, which is the first representative of the genus Scytosiphon C. Agardh. The circular mitogenome of S. lomentaria is 36,918bp in length, with the overall A+T content of 65.86%. The genome contains 67 genes, including 3 ribosomal RNA genes (rRNA), 25 transfer RNA genes (tRNA), 35 protein-coding genes and 4 unidentified open reading frames (ORFs). The gene order of S. lomentaria mitogenome conforms to that of Ectocarpales mitogenomes (not including Pylaiella littoralis), i.e. Petalonia fascia, and Ectocarpus siliculosus, but differs from Laminariales, Desmarestiales, Fucales and Dictyotales with position variation of several genes. The S. lomentaria mitogenome has an overall nucleotide sequence identity of 80.4% with P. fascia, and 74.9% with E. siliculosus. The present data is of value to phylogenetic analyses of such a diverse Scytosiphonaceae family as well as to understanding of mitogenome evolution in brown algae.