The phylogenetic trees based on concatenated 12 mitochondrial PCGs, and the gene orders of Adapedonta species. Values shown next to nodes are posterior probabilities (left) and ML bootstrap support values (right). Newly assembly mitogenomes are marked with triangles. Except for Panopea abrupta (https://inverts.wallawalla.edu) and Panopea globosa (Góngora-Gómez et al. 2016), the images of the other species are all from https://www.inaturalist.org.