Gene rearrangements of the Shinkaia crosnieri mitogenome. At least six rearrangements happen between mitogenomes of S. crosnieri and the ancestral pancrustacean pattern: (1) trnG; (2) trnR-trnN; (3) trnP; (4) nad1-trnL-CUN-rrnL-trnV-rrnS-CR-trnQ; (5) trnI; and (6) trnM-nad2. All tRNAs are designated by single letters (except L1, L2, S1 and S2 for trnL-CUN, trnL-UUR, trnS-AGN and trnS-UCN, respectively). Genes encoded on the minus strand are underlined. The putative control regions (CRs) are shaded.