FIGURES 18–23 in The larva of Dicterias Selys, 1853 (Odonata: Heliocharitidae [= Dicteriadidae]), and taxonomic and phylogenetic notes on Heliocharitidae

FIGURES 18–23. Heliocharis amazona (ultimate instar exuvia). Figure 18. Head and prothorax, dorsal view. a: detail of three last antennomeres and apex of fourth antennomere; b: general view. Figure 19. Head and prothorax, dorsolateral view. Figure 20. Prementum and labial palps, dorsal view. Figure 21. Prementum and labial palps, frontal view. Figure 22. Caudal lamellae. a: last abdominal segment with complete left lamella and base of right lamella (median lamella removed), dorsal view; b: median lamella, left lateral view. Figure 23. male left cercus, left lateral view.