Position class (Pcl) information of cox1 genes in the 13 Diaporthales species. Introns in cox1 genes of 13 mitogenomes calibrated were classified into different position classes (Pcls) using the cox1 gene of Juglanconis juglandina as the reference. Each Pcl was constituted by introns inserted at the same position of corresponding cox1 gene of J. juglandina and named according to its insertion site in the aligned corresponding reference sequence (nt). The Pcls in different color represent their different numbers among the 13 Diaporthales mitogenomes. Phylogenetic positions of the 13 species were established using the Bayesian inference (BI) method and Maximum-Likelihood (ML) methods based on combined mitochondrial data sets.