Contracaecum rudolphii B: Gene content, arrangement and composition of its complete mitochondrial genome compared with Anisakis simplex s.l.

► The complete mt genome of Contracaecum rudolphii B was determined and compared with that of Anisakis simplex s.l. ► mt Gene order for C. rudolphii B and A. simplex s.l. is the same but different from other nematodes. ► Strong bias for A and T in the mt genome of C. rudolphii B was observed. ► mtDNA sequences provide novel markers for studying the population genetics of C. rudolphii B.