Ascarophis (Ascarophis) nasonis Machida, 1981 from Naso spp. (A) Oesophageal part of female body, dorsoventral view; (B) anterior end of female, lateral view; (C) anterior end of female (another specimen, enlarged), dorsoventral view; (D) cephalic end, apical view; (E) vulva and vagina, lateral view; (F) tail of female, lateral view; (G) posterior end of male tail, lateral view; (H) posterior end of male, lateral view; (I) deirid; (J, K) egg. (A) and (C)–(J) from N. lituratus; (B) and (K) from N. unicornis.