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Figure 3 | EvoDevo

Figure 3

From: Adaptive evolution of the lower jaw dentition in Mexican tetra (Astyanax mexicanus)

Figure 3

Dorsal view of the mandible and rostral view of the premaxilla and maxilla of Astyanax mexicanus . Alizarin red stained adult surface fish (A-C), Tinaja cavefish (D-F) and surface surgery fish (G-I). (A,D,G) show the mandibles. The dotted box in (A,D,G) is enlarged in (B,E,H). In (A,D,G) teeth are arranged in one row in the rostral rim of the mandible. Rostral teeth are multicuspid and large in size. The black dotted arrow in (B) indicates the cusp tip of a multicuspid tooth which is yellow in color due to the iron deposition. The white arrowheads in (B) and black arrowheads in (H) indicate the caudal teeth which are smaller in size compared to the rostral teeth. The white asterisk in (B) indicates the tooth free zone that can be found between the rostral and caudal teeth of the surface fish but which cannot be seen in cavefish (double white asterisk in (E)). The black arrowhead in (E) indicates the successional tooth row. (C,F,I) show the right and left premaxillae and maxillae. In (C) premaxilla is indicated by the black dotted arrow and premaxillary tooth is indicated by the black arrowhead. The maxilla is indicated by the black arrow and maxillary teeth are indicated by the white arrow head in (C). The black arrow in the upper right corner of (A) and (B) indicates the rostral direction. The black arrow in (C) indicates the dorsal direction. All scale bars are 100 μm.

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