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Life in the Mesozoic (cont.). The Age of Dinosaurs. Saurischia “Reptile-Hipped Dinosaurs”. Sauropods (Herbivores) Theropods (Carnivores) Aves (Birds). Sauropods. Seismosaurus. Sauropods. Barapasaurus. Sauropods. apatosaurus. Theropods. Tyrannosaurus. Theropods. Velociraptor.
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Life in the Mesozoic (cont.) The Age of Dinosaurs
Saurischia“Reptile-Hipped Dinosaurs” • Sauropods (Herbivores) • Theropods (Carnivores) • Aves (Birds)
Sauropods Seismosaurus
Sauropods Barapasaurus
Sauropods apatosaurus
Theropods Tyrannosaurus
Theropods Velociraptor
Theropods allosaurus
Small Theropods Compsognathus
Skin Imprints Triceratops
Color? Ceratosaurus
Bottom Line Some dinosaurs were endotherms (small theropods) and others were ectotherms (large sauropods)
First in Flight - Pennsylvanian Cretaceous dragonfly
Meganeura monyi(roughly to scale) The largest insect in history More to come in the Mesozoic…
Second - The Flying Reptiles Pterosaurs Criorhynchus
Pterosaurs Pteranodon
Third - First Birds (Aves) Jurassic
Share Characteristics with Theropods Deinonychus
Feathered Dinosaurs Dilong paradoxus
Mesozoic Mammals Dinosaurs & Birds Pterosaurs Crocodiles Lizards & Snakes Synapsids (Mammals) Archosaurs Marine Reptiles Anapsids (Turtles) Diapsids
Mammals vs. Reptiles Development of jaw and ear bones Secondary palate Teeth differentiate Evidence for warm-blood
Mesozoic Mammals: Bigger than previously thought Repenomamus More with the Cenozoic…