The Lamniformes contains the extinct Megalodon -LRB- Carcharodon megalodon -RRB- , which like most extinct sharks is only known by the teeth -LRB- the only bone found in these cartilaginous fishes , and therefore are often the only fossils produced -RRB- and a few vertebrae .

The Lamniformes contains the extinct Megalodon -LRB- Carcharodon megalodon -RRB- , which like most extinct sharks is only known by the teeth -LRB- the only bone found in these cartilaginous fishes , and therefore are often the only fossils produced -RRB- .
