Raphidascaris (Ichthyascaris) fasciati n. sp., scanning electron micrographs of male. (A) Dorsal lip; (B) posterior end of male, lateral view; (C) tail, sublateral view (arrow indicates postanal double papilla); (D) region of cloaca and tail, dorsoventral view (arrow indicates postanal double papilla); (E) postanal papillae of three posteriormost pairs; (F) region of postanal papillae of four posteriormost pairs, lateral view. (a) Labial double papilla; (b) postanal double papilla; (c) cloacal aperture; (d) phasmid; (s) spicules.