Pterygodermatites (Pterygodermatites) mexicana n. sp. Scanning electron micrographs. 10. Anterior end of male, ventral view. 11. Anterior end of female, dorsal view. 12. Anterior end of male, dorsal view. 13. Anterior end of female, dorsal view. 14. Stoma of female, showing denticles. 15. Ventral view of anterior combs of male. 16. Anterior end of male in lateral view, showing deirid. 17. Posterior end of male, showing subventral combs and ventral cuticular processes. 18. Lateral view of postvulvar subventral spines at midbody of female. 19. Subventral spines near the posterior end of female. 20. Spines around the vulva, ventral view. Abbreviations: am-amphid, d-deirid, ep-excretory pore.