Gene rearrangements of decapod mitogenomes. The ancestral pancrustacean pattern is depicted by four dendrobranchiatans, two carideans and one palinuran. All tRNAs are designated by single letters (except L1, L2, S1 and S2 for trnL-CUN, trnL-UUR, trnS-AGN and trnS-UCN, respectively). Asterisks indicate rearrangement from the ancestral order. A cross shows the insertion of a trnL-CUN in Geothelphusa dehaani. Putative control regions (CRs) are shaded. Genes encoded on the minus strand are underlined. Numbers on the right of each genome specify block interchanges from the ancestral pattern. Especially, in the mitogenome calculations on G. dehaani and Shinkaia crosnieri, the additional or absent genes were excluded respectively.