Otodus auriculatus

Otodus auriculatus is an extinct species of large shark in the genus Otodus of the family Otodontidae and is a predecessor of the megalodon. The largest individuals were about 9.5 metres (31 ft) long and teeth can reach up to 130 millimetres (5.1 in). Its teeth were the first in the genus Otodus to have both coarse serrations on the cutting edge and lateral cusplets.