Mitochondrial genome maps of Amphipoda. Changes with respect to the hypothetical pancrustacean gene order are highlighted in grey. Genes located above the central line correspond to genes coded on the (+) strand, whereas those coded on the (-) strand appear below. The dashed segment of the mitogenome of Parhyale hawaiensis corresponds to accession numbers FM957525-6 . The control region (CR) of Metacrangonyctidae is depicted in the middle line of the genome map to account for the uncertainty of in which strand lies the replication origin.