Raphidascaris (Ichthyascaris) fasciati n. sp., scanning electron micrographs of male. (A and B) Posterior end of body, lateral views (two different specimens); (C) posterior end of tail, lateral view (arrow indicates postanal double papilla) (note different structure of cuticle on ventral and dorsal sides); (D) postanal papillae of three posteriormost pairs (arrow indicates double papilla).