Fig. 4

Three embryonic stages of four gecko species showcasing lack of dorsal and craniofacial pigment (stage 36), early visible accumulation of dorsal and craniofacial pigment (stage 39), and near-hatching dorsal and craniofacial pigment (stage 42). Gekko kuhli stages 36 (a), 39 (b), and 42 (c). Lepidodactylus lugubris stages 36 (d), 39 (e), and 42 (f). Phelsuma laticauda stages 36 (g), 39 (h), and 42 (i). Sphaerodactylus macrolepis stages 36 (j), 39 (k), and 42 (l). Scale bars = 2 mm