Fig. 4

The naso-palatal complex in the brown anole at stage 7. A Ventrolateral view of the palate. A’ Ventrolateral view of the palate (semi-transparent). B Anterolateral view of the snout. C Anterior view of the semi-transparent snout. C′ Zoomed anterior view of the left early nasal cavity. C” Zoomed anterior view of the left early nasal cavity rendered with partial opacity. D Sagittal cutaway of the semi-transparent snout showing the medial view of the left early nasal cavity. D’ Zoomed medial view of the left early nasal cavity rendered with partial opacity. Abbreviations: a anterior, e eye, ecs extraconchal space, fnm frontonasal mass, lnc lateral nasal concha, lnp lateral nasal prominence, mxf maxillary fold, mxp maxillary prominence, np nasal plug, oe olfactory sensory epithelium, pct primitive choanal tube, pn primitive naris, Stt Stammteil, tel telencephalon. Red star primordium of the vomerine cushion, red arrowhead nasolacrimal groove, single white arrow approaching of the maxillary prominence to the frontonasal mass, grey dashed line presumptive external naris. Note: italicized label on 3D image (lnc) indicates the concavity in the early nasal cavity. Scale bars 200 μm