Dinosaur Fossils
Dinosaur Fossils
Spinosaurus Fossil Teeth
Spinosaurus is estimated to have been THE LARGEST of all meat-eating dinosaurs that ever lived. With a length of 52.5 to 59 feet long, 20 feet high and 9 - 10 tons in weight, it was truly a behemoth! Its most unusual feature was a row of broad club-shaped spines 6 feet tall, projecting upward from the backbone. It's believed that these spines were covered with a sail of skin which could be raised by the creature as a social display or as a way to regulate body temperature.
Spinosaurus Tooth |
Spinosaurus Tooth |
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Hadrosaurs
Hadrosaurs, commonly known as duck-billed dinosaurs, occupied subtropical environments in the coastal lowlands of the central United States during the Cretaceous Period, about 100 million years ago. The fossils below are vertebrae from baby Hadrosaurs that were found in Utah.
Hadrosaurs vertebrae |
Hadrosaurs vertebrae |
Hadrosaurs vertebrae |
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Hadrosaurs vertebrae |
Hadrosaurs Tooth |
Albertosaurus
Although the small flesh-eating dinosaurs were diverse and dangerous, Cretaceous Alberta was ruled by members of the family Tyrannosauridae. All tyrannosaurs had hind legs that were long and powerful, with each hind foot having three toes ending in enormous claws. The two-fingered front limbs were small, not much larger than a mature human arm. The function of the front limbs is not known; they are too short to have passed food to the mouth.Albertosaurus, the "Alberta lizard" was among the more fearsome predators in Cretaceous Alberta. Almost 10 metres long, it is the most common of the large carnivores found here. Smaller but longer-limbed than Tyrannosaurus rex, Albertosaurus would have been a mobile hunter, although it probably fed on the carcasses of already dead animals as well.Although over eight metres in length, three metres high at the hip, and weighing more than two tonnes, Albertosaurus may have been capable of attaining speeds of up to 40 kilometres an hour. This fleetness, combined with obvious physical strength, would have made Albertosaurus a fierce hunter, perhaps even more so than the more massive Tyrannosaurus rex. Albertosaurus' neck was strong and muscular, supporting a large but lightly built head. The teeth were long and recurved with saw-like edges, perfect for tearing flesh. They were not adapted for chewing, make it likely than Albertosaurus, like most modern reptiles, swallowed flesh in large chunks. This specimen is about as close as you will get to a T-Rex tooth for your collection.
Albertosaurus Tooth |
Albertosaurus Tooth Section |
Albertosaurus Tooth Section |
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Albertosaurus Tooth Section |
