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Class: Sauropsida
Iguanodon only had one replacement tooth at a time for each position
who first described Megalosaurus
Late Carboniferous to late Permian (270 m
Triceratops Lower Jaw Beak Ankylosaurus Class: SauropsidaThis is the lower jaw beak of Triceratops. The original was found in the Hell Creek Formation of late Cretaceous Age or about 66 million years ago. Individual Triceratops are estimated to have reached about 7. 9 to 9. 0 meters (26. 029. 5 feet) in length, 2. 9 to 3. 0 meters (9. 59. 8 feet) in height, and 6. 112 tons (13,00026,000 pounds) in weight. The most distinctive feature is their large skull, among the largest of all land animals. The largest