Mitonuclear discordance of beetles shaped by incomplete lineage sorting and introgression under loose interaction mechanism

Dataset included 53 samples and three types of genes: single-copy genes (AA sequences of 2,123 single-copy genes), mitochondrial genes (13 protein-coding genes (PCGs) and two rRNA genes), and nuclear genes related to OXPHOS (nucl-OXPHOS: AA sequences of 156 genes). Additionally, a dataset of 195 samples was constructed using only the mitochondrial genes.