This is a nice, large, and robust tooth from the crocodiliform  Mahajangasuchus. Reaching up to three meters in length and equipped with a powerful skull, and armed with conical, serrated teeth, it would have been a formidable predator of both land and aquatic prey. 
 
Age: 70- 66 Million Years Old
 
Location: Maevarno Formation, Madagascar
 
Length of tooth: 0.91 inches