Life in the Mesozoic (cont.) The Age of Dinosaurs.
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Life in the Mesozoic (cont.) The Age of Dinosaurs
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Transcript of Life in the Mesozoic (cont.) The Age of Dinosaurs.
Life in the Mesozoic (cont.)
The Age of Dinosaurs
Saurischia“Reptile-Hipped
Dinosaurs”
1.Sauropods (Herbivores)2.Theropods (Carnivores)• Aves (Birds)
Sauropods
Seismosaurus
Sauropods
Barapasaurus
Sauropods
apatosaurus
Theropods
Tyrannosaurus
Velociraptor
Theropods
allosaurus
Theropods
Small Theropods
Compsognathus
How do we know about Dinosaur Behavior?
Dino Nests
Dinosaur Trackways
How do we know about Dinosaur Color and
Soft “Stuff”?
Skin Imprints
Triceratops
Brain Casts & Gizzard Stones
Color?
Ceratosaurus
Warm vs. Cold Blood(Endotherms vs.
Ectotherms)
Predator/Prey Ratios
Bone Structure
Upright Posture & Fast Speeds
Problems - Food & Heat Loss
Bottom Line
Some dinosaurs were endotherms (small
theropods) and others were ectotherms (large
sauropods)
Adapting to the Skies
First in Flight - Pennsylvanian
Cretaceousdragonfly
Meganeura monyi (roughly to scale)
The largest insect in history
More to come in the Mesozoic…
Second - The Flying Reptiles Pterosaurs
Criorhynchus
Pterosaurs
Pteranodon
Pterosaurs:
Pterodaustro
Third - First Birds (Aves)
Jurassic
archaeopteryx
Share Characteristics with Theropods
Deinonychus
Caudipteryx
Feathered Dinosaurs
Dilong paradoxus
Last…Mammals (Cenozoic)
Bats
Mesozoic Mammals
Synapsids(Mammals)
Anapsids(Turtles)
Diapsids
Lizards& Snakes
Crocodiles
Pterosaurs
MarineReptiles
Dinosaurs& Birds
Archosaurs
Triassic - Lystrosaurus
Mammals vs. Reptiles
1. Development of jaw and ear bones2. Secondary palate3. Teeth differentiate4. Evidence for warm-blood
Mesozoic Mammal Teeth
Cynodonts (Triassic)
Small Insectivores
Mesozoic Mammals: Bigger than previously
thought
Repenomamus
More with the Cenozoic…
