Fig. 6

SEM images of Thelazia leesei males. A Apical view of the anterior region showing mouth opening (asterisk), six labial papillae (arrowheads), twinned cephalic papillae (arrows), and two amphidial pores (§) at the lateral side. B Posterior region showing caudal papilla (asterisk). C Posterior region showing caudal papillae (white arrowheads), precloacal central papilla (arrow), left spicule (L) and right spicule (R), and a large posterior papilla (black arrowhead). D Tail extremity showing single precloacal central papilla (arrow) in front of cloaca, right spicule (R) from cloaca, and large caudal papillae near the tail extremity (black arrowheads)