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

Figure 5

Skeleton of Isurus denticulatus (Glickman, 1957) (NMB no. 3916 Foerth-Isurus-1) from the late Turonian (Suprionocyclus normalis Zone) of Halle/Westphalia (Germany). (a) Photo without vertebra 71, 147, and teeth and interpretative drawing of the skeleton with integrated vertebra 71, 147, and teeth. (b) Vertebrae: 1. vertebra no. 72 in different views before and after cross sectioning; cranial, ventral, dorsal, lateral, cross sections, and interpretative drawing; 2. vertebra no. 126 in different views before and after cross sectioning; cranial, ventral, dorsal, lateral, cross sections, and interpretative drawing. (c) Teeth; 1. lateral tooth (see (a) = T2), labial; 2. anterior tooth (see (a) = T3), labial; 3. lateral rootless tooth (see (a) = T4), lingual; 4. lateral rootless tooth (see (a) = T5), lingual; 5. lateral rootless tooth with lateral cusps (see (a) = T1), labial. (d) Dermal denticles from the head region. 1–5; first scale type I of the mouth and gills bars—1. posterior, 2. occlusal, 3. occlusal, 4. lateral, 5. basal. 6-7; second scale type II from upon the gills—6. occlusal, 7. lateral. 8–10; third scale type III, all occlusal. 11-12; fourth scale type IV, both occlusal.