The first complete mitochondrial genomes for Serranus papilionaceus and Serranus scriba, and their phylogenetic position within Serranidae

Background: Butterfly-winged comber, Serranus papilionaceus Valenciennes, 1832, was recently resurrected and so it is no longer considered as a junior synonym of the Painted comber, Serranus scriba (Linneus, 1758). This calls for a more comprehensive phylogenetic assessment using mitochondria DNA genomes to better understand the relationship and delineate these two species.

Methods and results: Next-generation Sequencing was applied to sequence the genome of these two Serranus species. The data generated was then used to construct the mitochondrial genome of these two species. This produced the first complete mitochondrial genomes for the genus Serranus here represented by Serranus papilionaceus and Serranus scriba. These two mitochondrial genomes are 16,514 bp and 16,512 bp respectively, and both contained the typical 37 genes found in vertebrates (13 protein-coding genes, two ribosomal RNAs, 22 transfer RNAs), together with the O_L and the control region.

Conclusions: These mitochondrial genomes provide a new insight into the phylogenetic and evolutionary connections between the various subfamilies within Serranidae, while providing new molecular data that can be applied to discriminate between the studied species.