09-Dinos_classify

09-Dinos_classify - Therapoda Sauropodomorpha Fabrosauridae...

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460:206 DINOSAURS Classification of the Dinosaurs
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Dinosaurs Oldest Dinosaur fossils ~228 Ma (late Triassic). First Appearance- 228 Ma Last Appearance- 65 Ma Small Bipedal Carnivores 1st Dinosaurs (Theropods). Only known from few bones, so hard to reconstruct.
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Dinosaurs 1st remains found in South America (mainly Argentina).
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What trait defines Dinosaurs??
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Ornithischians Saurischians The Five Dinosaur Faunas
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Anatomy of the Pelvis Three bones join at acetabulum (“vinegar cup”)
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Dinosaur Pelvic Morphology Opening in acetabulum Elongated pubis and ischium
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Saurischian pelvic morphology Three bones radiate from acetabulum in three different directions
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Ornithischian pelvic morphology Pubis is parallel to the ischium
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DINOSAURS Saurischians Ornithischians “Lizard hips” “Bird hips”
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Herrera- sauridae
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Unformatted text preview: Therapoda Sauropodomorpha Fabrosauridae Thyreophora Ornithopoda Margino-cephalia 1. Herrerasauridae Oldest known and one of the 1st dinosaurs. Very primitive. Close relatives to Theropods. Found by farmer in Argentina. Herrerasauridae Small to medium carnivores. Did have Lizard-Hip, but lacked other features to be considered true dino. Five fingers. Claws, short forearms, fast runners. Bird-type foot (walk on digist 2-3-4) Predentary Bone Fabrosauridae Herbivore Lived in early Jurassic. First of the Ornithischian Dinosaurs (Pre-ornithopod). Very small (modern cat size). Recessed tooth row. Cheeks (way to process food in mouth) Cheek tooth enamel Phylogeny of Dinosaurs Figure 4.17, pg. 55...
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This note was uploaded on 02/18/2011 for the course DINOSAURS 206 taught by Professor Neitzke during the Spring '11 term at Rutgers.

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09-Dinos_classify - Therapoda Sauropodomorpha Fabrosauridae...

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