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. Author manuscript; available in PMC: 2016 Dec 1.
Published in final edited form as: Dev Dyn. 2015 Sep 10;244(12):1457–1468. doi: 10.1002/dvdy.24338

Figure 5.

Figure 5

External views of amniote palates at late fetal stages. The secondary palate in the mouse and alligator is completely closed (A,B). In the chicken, there is a cleft between the palatal shelves, but the shelves still cover most of the palate (C). The chameleon also exhibits relatively substantial palatal shelves (D). In the leopard gecko, the palatal shelves are highly reduced (demarcated by white, dashed lines) (E). This gives access to the vomeronasal organ, located in the roof of the mouth. In the turtle, there are no palatal shelves, and the choanae (internal nares) open directly into the oral cavity (F). c, choana; ps, palatal shelf; pv, palatal valve; sp, secondary palate. Scale bars: 2mm (A,B,C,E,F); 1mm (D)