Skeleton of the Fossil Shark Isurus denticulatus from the Turonian (Late Cretaceous) of Germany—Ecological Coevolution with Prey of Mackerel Sharks

Figure 8

Stratophylogenetic trend within the genus Isurus during the Cretaceous and Tertiary. The cusplets were reduced from anterior to posterior changing from a catching to cutting type dentition (see also [11, 12]). Serrations were developed twice to Carcharodon and Isurus escheri (after [3]).