# Ion Torrent data for the genome assembly and phylogenomic placement of mitochondrial genomes with a focus on houndsharks (Chondrichthyes: Triakidae)

## TL;DR

This paper provides new Ion Torrent sequencing data for houndshark mitochondrial genomes, offering insights into their genetic structure and evolutionary relationships.

## Contribution

The study presents the first Ion Torrent NGS data for houndshark mitogenomes, including detailed gene content and GenBank accessions.

## Key findings

- Five houndshark mitogenomes were sequenced, each with 13 PCGs, 2 rRNA genes, and 22–23 tRNA genes.
- tRNA gene duplication patterns vary among species, with tRNASer and tRNALeu duplicated in most.
- The data supports future research on the diversification and phylogeny of groundsharks.

## Abstract

Here, we present, for the first time, the Ion TorrentⓇ next-generation sequencing (NGS) data for five houndsharks (Chondrichthyes: Triakidae), which include Galeorhinus galeus (number of bases pairs (bp) 17,487; GenBank accession number ON652874), Mustelus asterias (16,708; ON652873), Mustelus mosis (16,755; ON075077), Mustelus palumbes (16,708; ON075076), and Triakis megalopterus (16,746; ON075075). All assembled mitogenomes encode 13 protein-coding genes (PCGs), two ribosomal (r)RNA genes, and 22 transfer (t)RNA genes (tRNALeu and tRNASer are duplicated), except for G. galeus which contains 23 tRNA genes where tRNAThr is duplicated. The data presented in this paper can assist other researchers in further elucidating the diversification of triakid species and the phylogenetic relationships within Carcharhiniformes (groundsharks) as mitogenomes accumulate in public repositories.