The complete mitochondrial genome of Paraplagusia blochii (Pleuronectiformes: Cynoglossidae)

Abstract

Paraplagusia blochii (Cynoglossidae, Soleoidei) is characterized by both eyes on the left side of the body with a short rostral hook reaching only to hind margin of lower eye. Here we first report the mitogenome of this tongue sole, which is 16,611 bp in length, and the gene order has been reorganized. Specifically, the tRNA-Gln gene encoded by the light strand (l-strand) has been translocated to the heavy strand (H-strand), accompanied by the tRNA-Ile gene shuffling. In addition, the putative control region has been translocated downstream to a position between the ND1 and tRNA-Gln genes, leaving a 24-bp trace fragment in the original position. Nevertheless, the rest gene arrangement is identical to that of the typical fish. The determination of the complete mitogenome sequence of P. blochii could contribute to a better understanding the molecular mechanisms of gene reorganization in fish mitogenome and phylogenetic study of Soleidae and Pleuronectiformes.