First draft genome release for the sand-hopper Trinorchestia longiramus

Crustacean amphipods are considered as an important trophic link between primary producers and higher consumers and help in the energy flow within the ecosystem. Among amphipods, Talitridae is the only family exceptionally found in terrestrial and semi-terrestrial habitats. The sand-hopper <i>Trinorchestia longiramus</i> is a talitrid species often found in the sandy beaches of South Korea. In this study, we generated ~380.3Gb of sequencing data and assembled to 0.89 Gb of the draft genome. By combining <i>ab initio</i> and homologous gene predictions 26,123 protein-coding genes were predicted from this genome. The completeness of the gene model was estimated with BUSCO, which resulted in 89.9%. Comparison with other amphipods showed that <i>T. longiramus</i> has 327 unique orthologous gene clusters, which are mostly expanded gene families responsible for the transport of toxicants from the cells, homeostatic process and tolerating ionic and osmotic stress. This first talitrid genome will be useful for further understanding the mechanisms of adaptation in the terrestrial environments as well as genomic variation from other amphipods.