Basic information on Identifying Dinosaur teeth by shape

​Biology of Sharks and Rays - Information and Identification

Dinosaur & Sharks Teeth :  A shark tooth is one of the numerous teeth of a shark. A shark tooth contains resistant calcium phosphate materials.[1] Sharks continually shed their teeth; some Carcharhiniformes shed approximately 35,000 teeth in a lifetime, as well as replace them by producing thousands of more.[2] There are four basic types of shark teeth: dense flattened, needle-like, pointed lower with triangular upper, and non-functional. The type of tooth that a shark has depends on its diet and feeding habits.

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   Ichthyology at the Florida Museum of Natural History