The complete mitochondrial genome of the Capsaloides cristatus (Platyhelminthes, Monogenea), a pathogen of the sailfish (Istiophorus platypterus).

This study reports the complete mitochondrial genome of the Capsaloides cristatus (Monogenea: Capsalidae) collected from the gill lamella of Istiophorus platypterus. The total length of the mitogenome was 13,948 bp, containing 12 typical platyhelminthic protein-coding genes, 22 tRNA genes, 2 rRNA genes and a putative non-coding region, with the atp8 gene being absent. The total A + T content was 65.99%, which was significantly higher than that of the C + G content (34.01%). There were two kinds of start codons (ATG and GTG) and three kinds of terminated codons (TAA, TAG and TGA) in the 12 protein-coding genes. Phylogentic analysis revealed close relationships among the genera Capsaloides, Capsala, Benedenia and Neobenedenia with high bootstrap value supported. This study will provide useful molecular data for a better understanding of the species identification and phylogenetic position of C. cristatus.