Dataset supporting description of the new mussel species of genus (Bivalvia: Mytilidae) and metagenomic data of bacterial community in the host mussel gill tissue.

This article contains supplementary data from the research paper entitled "A newly discovered bivalve mussel from the Onnuri Vent Field on the northern Central Indian Ridge" [1], describes a new mussel species within the subfamily Bathymodiolinae named . Data are comprised of two parts: 1) shell image and molecular analyses of and 2) metagenomic community analyses of gill-associated symbiotic bacteria on data were obtained from type specimens described in Jang et al. 2020 [1]. The molecular analysis was conducted by calculating genetic distance at intra- and inter-specific level within genus based on the sequence data of two mitochondrial genes ( and ). The metagenomic dataset of gill-associated symbionts were generated by Illumina Miseq sequencing of the V3-V4 region of rRNA from 12 specimens of collected from the same vent site, Onnuri Vent Field.