Fig. 11

The naso-palatal complex of the brown anole at stages 18 and 19 based on 3D reconstructions (A–A” and C, C′) and histological transverse sections (B and D–F). A Lateral view of the nasal cavity (shown without the lateral nasal gland); stage 18. A’, A” Lateral (A) and laterodorsal (A”) views of the nasal cavity rendered with partial opacity; stage 18. B Section through the vestibulum; stage 18. C Dorsal view of the snout (semi-transparent); stage 18. C′ Dorsal view of the nasal cavity (shown without the lateral nasal gland); stage 18. D Section at the level of the closed choanal groove; stage 19. E Higher magnification of the smaller box from D. F Higher magnification of the larger box from D. Abbreviations: a anterior, Bg Bowman’s glands, chg choanal groove, dng main duct of the lateral nasal gland, dv duct of the VNO, en external naris, ict inner choanal tube, L1–L3 layers of the sensory olfactory epithelium, lcf lateral choanal fissure, ld lacrimal duct, lng lateral nasal gland, np nasal plug, ns nasal septum, oct outer choanal tube, oe olfactory epithelium, ptc parietotectal cartilage, scf subconchal fold, smx septomaxilla, sst spongy sinusoidal tissue, Stt Stammteil, vc vomerine cushion, ves vestibulum. Green asterisk anterior extension of the lateral nasal concha. Note: italicized labels on 3D images indicate the concavities in rendered structures. Colours of 3D structures as in Fig. 9. Scale bars 50 μm (B), 350 μm (C), 200 μm (D), 20 μm (E and F)