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Longitudinal sections through the pre-maxilla and mandible of a 5-month-old female A. mantelli (×4). (a) Pre-maxilla (pointing left) showing deep forward facing pits at the tip and outward facing pits in the dorsal zone (examples marked P). (b) Mandible (pointing right) showing deep pits in the bone (examples marked P). Stain: Masson's trichrome. K = keratin layer. Images are oriented dorsal side up.
