Egyptian spine lizard
Cretaceous Period, 112-93.5 MYA
Countries in Africa
50 feet long, 15 feet tall at the hips (20 at the sail), 7-10 tons
- Spinosaurus is one of the contenders for largest known carnivorous dinosaur.
- There is much debate over the exact function of Spinosaurus’s spectacular sail. Some believe it was used for thermoregulation, others for display, while some think it may have supported a muscular hump like that of a bison. Some of the spines grew to be nearly 7 feet long.
- Spinosaurus is the only dinosaur that seems to be adapted for a semiaquatic lifestyle. It had an elongated, narrow snout that was crocodilian in shape with conical teeth, sensory pits along the jaws, and nostrils placed high on the head. The feet were flat and likely webbed, the tail was highly flexible, and its limb bones were solid to act as a buoyancy aide in the water. By specializing in aquatic prey, Spinosaurus was able to avoid directly competing with the other predators which shared its environment.
Kingdom - Animalia Phylum - Chordata Class - Reptilia Order - Saurischia Family - Spinosauridae Genus - Spinosaurus Species - S. aegypticus