Pterygodermatites (Mesopectines) valladaresi n. sp., male, scanning electron microscopy. (A) General view; (B) cephalic extremity, lateral view; (C) cephalic extremity, ventral view; (D) apical view of the cephalic extremity showing labial and cephalic papillae; (E) detail of the buccal capsule showing the oral denticles. *, internal circle of 6 labial papillae; arrowhead, external circle of 4 labial papillae plus 4 cephalic papillae, grouped in pairs; BC, buccal capsule; d, deirid; dT, dorsal oesophageal tooth; ep, excretory pore; od, oral denticles.