Incorporation of microgastropoda species provides novel insights into phylogeny of Trochoidea (Gastropoda: Vetigastropoda).

Trochoidea is the richest and most diverse group within Vetigastropoda, serving as one of the main focuses on studies of marine ecology and systematics. Both morphological and molecular studies have sought to resolve the phylogenetic framework of Trochoidea; however, the phylogenetic relationships among some lineages remain controversial. In order to explore the phylogenetic relationships within Trochoidea, we sequenced the mitochondrial genomes of 9 trochoids and analyzed them with data from 38 previously published mitochondrial genomes and 27 transcriptomic data representing 11 families within this group.