The mitochondrial genome of hydrothermal vent barnacle (Cirripedia: Thoracica) from the Indian Ocean.

Balanomorph species are hydrothermal vent endemic barnacles. In the genus , three species are known to date and they distribute at three different vent fields in Pacific and Indian Oceans, in the Southwest Pacific Ocean, in the East Pacific Ocean, and in the Indian Ocean. Therefore, species are considered to be a meaningful model taxon to elucidate the evolutionary history of vent organism in relation to geotectonic events. Here, we characterized the partial mitogenome of a newly described vent barnacle Chan et al., 2020 from the Solitaire vent field in the Indian Ocean. The length of mitogenome was 16,804 bp with 64.0% AT content. Its gene content and organization was identical to those of . There was one significant part in the mitogenome of , which was a long intergenic region over 2 kb found between tRNA and tRNA. The phylogenetic tree suggested the monophyly of and with high supporting values. In the future, additional mitogenome analysis of the last species, , could expand our understanding about the speciation and global distribution of species.