Next-generation sequencing yields the complete mitochondria! genome of the mummichog, Fundulus heteroclitus

Fundulus heteroclitus (Actinopteri, Cyprinodontiformes, Fundulidae), with a remarkable tolerance to osmotic stress and water temperatures, are regarded as a significant evolution model. Herein, we report the assembled complete sequence of the mummichog mitochondrial genome based on the next-generation sequencing data. The mitogenome is determined to be 16 528 bp in length and shows an organization typical of vertebrate mitochondrial genomes, including 13 protein-coding genes, 2 ribosomal RNA genes, 22 transfer RNA genes, and 1 control region (D-loop). Overall GC content of the genome is 39.72%. Using Oryzias latipes as the outgroup, the phylogenetic analysis of 16 complete mitochondrial genomes from Cyprinodontiformes showed that F. heteroclitus together with other three Fundulus species form a cluster with strong bootstrap supports. The genus Fundulus is closely related to the genus Xenotoca.