FIGURES 5–13 in Ancyronyx reticulatus and A. pulcherrimus, two new riffle beetle species from Borneo, and discussion about elmid plastron structures (Coleoptera: Elmidae)

FIGURES 5–13. Ancyronyx reticulatus, female: 5) head and pronotum, dorsolateral view; 6) reticulate surface and elongate granules on head, dorsolateral view; 7) pronotum, detail of reticulate and punctate surface on anterior portion, dorsolateral view; 8) head and anterior portion of prothorax, showing gular sutures, ventrolateral view; 9) enlarged view of area indicated on previous figure showing cuticular sculpture on gena possibly associated with plastron; 10) head, prothorax, procoxa and part of mesoventrite, ventral view; 11) prosternum, mesoventrite and part of metaventrite, ventral view; 12) prosternal sculpture with more or less cordiform granules and irregular deep punctures, ventral view; 13) thorax and anterior ventrites, ventral view.