General view of the posterior parts of the nematodes. (A) A female and (B) male nematode. (C) Arrowheads indicate a pair of lateral caudal appendages of a female. (D) The cloacal anterior side of a male with four pairs of precloacal papillae (arrowheads) and one median papilla anterior to the cloaca (arrow). (E) The cloacal posterior side of a male with four pairs of post-cloacal papillae (arrowheads) and a pair of lateral caudal appendages (arrows). (F) (a) The right and (b) left spicules of the posterior end of a male. (G) The right spicule of a male.