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Extraordinary number of gene rearrangements in the mitochondrial genomes of lice (Phthiraptera: Insecta)

The arrangement of genes in the mitochondrial (mt) genomes of most insects is the same, or near‐identical, to that inferred to be ancestral for insects. We sequenced the entire mt genome of the small pigeon louse, Campanulotes bidentatus compar, and part of the mt genomes of nine other species of lice. These species were from six families and the three main suborders of the order Phthiraptera. There was no variation in gene arrangement among species within a family but there was much variation in gene arrangement among the three suborders of lice. There has been an extraordinary number of gene rearrangements in the mitochondrial genomes of lice!