Anolis sagrei stages 4-19 Brain Stage 5Developing cephalic bulges are distinct enough to distinguish into the cerebrum, optic tectum, and hindbrain. Stage 6The dorsal bulge that makes up the optic tectum is more exaggerated than in previous stage. Stage 7The cerebellum begins to form a more distinctive bulge caudo-ventrally. Stage 8Continued growth of the cerebrum and cerebellum. Stage 9The beginning of the olfactory bulb starts forming at the dorso-frontal position. Continued growth of the cerebrum and cerebellum. Stage 10Olfactory bulb has grown. The areas around the cerebrum and optic tectum are noticeably larger. Cerebellum and hindbrain have grown. Stage 11Regions of the brain, especially around the cerebellum and optic tectum, have increased in size compared to previous stage. Stage 12Cerebellum and optic tectum have increased in size again compared to previous stage. Stage 13Cerebellum and optic tectum are less distinct. Stage 14Optic tectum and cerebellum are less distinct. Stage 15Olfactory bulb has frown longer than in previous stage. Hindbrain has increased in size. Optic tectum and cerebellum are less distinct. Stage 16Optic tectum and cerebellum are less distinct. Stage 17No change from previous stage. Stage 18No change from previous stage. Stage 19No change from previous stage.
