10-sauropods - Long, slender skulls and muzzles Sauropod...

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460:206 Spring 2009 DINOSAURS The Sauropodomorphs
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Order Sauropodomorpha Infraorder Prosauropoda Infraorder Sauropoda
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Sauropods
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Prosauropoda Diplodocidae Titanosauridae Camarasauridae Brachiosauridae
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Prosauropods Early plant-eating dinosaur Late Triassic – Early Jurassic Period
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Prosauropods Heavily-built skeleton, 11-meters long Riojasaurus , Argentina
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Prosauropods as Herbivores Jaw hinge below the upper tooth row (similar to plant-eating ornithischians) Depressed jaw hinge
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Prosauropods as Herbivores Small stones in stomach region Gastric mill, gizzard
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Mussaurus “mouse lizard” 20 centimeters in total body length
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Prosauropod geographic distribution, Figure 6.1
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Prosauropod Extinction End of Early Jurassic Period First significant disappearance of dinosaur group Rise of other dinosaurian herbivores…replacement?
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Sauropods High diversity up to 75 genera
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Sauropods Early Jurassic Period – end of Cretaceous Period Hiatus 25 Ma
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Sauropod geographic distribution, Figure 6.6 Early Jurassic Period – end of Cretaceous Period
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Infraorder Sauropoda Family Diplodocidae Family Titanosauridae Family Camarasauridae Family Brachiosaurus
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Family Diplodocidae
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Unformatted text preview: Long, slender skulls and muzzles Sauropod Ecology and Behavior POSITIONAL BEHAVIOR Neural spine is bifurcated Strong ligament to support head Family Diplodocidae Lightly built relative to other large-bodied dinosaurs Family Titanosauridae Body armor Saltasaurus , Argentina Cretaceous Period Infraorder Sauropoda Family Diplodocidae Family Titanosauridae Family Camarasauridae Family Brachiosaurus Family Camarasauridae Short, heavy skulls with blunt muzzles Chambered lizard Family Camarasauridae Solidly-built skeleton Who was the largest dinosaur? Body weight vs. Body length Sauropod Ecology and Behavior LOCOMOTION Obligatory quadrupeds Sauropod Ecology and Behavior LOCOMOTION Terrestrial, limbs are graviportal Sauropod Ecology and Behavior POSITIONAL BEHAVIOR Neural spine is bifurcated Strong ligament to support head Sauropod Ecology and Behavior POSITIONAL BEHAVIOR Sauropod Ecology and Behavior POSITIONAL BEHAVIOR Sauropod Ecology and Behavior REPRODUCTION Egg-laying Sauropod Ecology and Behavior SOCIAL BEHAVIOR Sauropod Trackways...
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10-sauropods - Long, slender skulls and muzzles Sauropod...

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