0.65" (1.63 cm) Abelisaur tooth from the Maevarano Formation from the Mahajanga Basin, Madagascar. 70 to 65 million years old. 

This is an unusual tooth, the serration count is 17 to 18 serration per 5 mm. That too small for known Majungasaurus, and too big for known Masiakasaurus. Might be an unknown species or an adult Masiakasaurus tooth.