FIGURES 1–23 in A comparison of external and internal maxilla and mandible morphology of water bugs (Hemiptera: Heteroptera: Nepomorpha)

FIGURES 1–23. Shape of the mandibular file. Nepidae: Nepinae, 1. Laccothrephes japonensis, 2. Nepa cinerea, Ranatrinae, 3. Cercotmetus asiaticus, 4. Ranatra chinensis; Belostomatidae: Belostomatinae; 5. Belostoma flumineum; 6. Dienostoma dilatatum; 7. Appasus major; 8. Limnogeton fieberi; 9. Hydrocyrius colombiae; Lethocerinae: 10. Lethocerus deyrollei; Gelastocoridae: Gelastocorinae, 11. Gelastocoris oculatus; Nerthrinae, 12. Nertha nepaeformis; Ochteridae: 13. Ochterus perbosci; Aphelocheiridae: 14. Aphelocheirus aestivalis; Naucoridae: Cheirochelinae; 15. Cheirochela feana; 16. Tanycricos longiceps; Cryphocricinae, 17. Ambrysus occidentalis; 18. Cryphocricos hungerfordi; Laccocorinae: 19. Heleocoris humeralis; Limnocorinae: 20. Limnocoris lutzi; Naucorinae, 21. Ilyocoris cimicoides; 22. Macrocoris rhantoides; 23. Pelocoris femoratus. Rmd—right mandible, bp—blunt pegs, sph—short spines, spl—long spines.