Duck-Bills (Ornithopoda)
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| Nickname for ornithopod | Bird Foot
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| Most were bipedial or quadrupedal? | bipedial
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| Time frame of existence: | Early Jurassic to end of Cretaceous
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| How did the ornithipod existence do? | Good, they were extremely successful though they didn't have any spikes or horns
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| Anatomy: Specializing in crushing certain types of foods? | Dental specialization
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| What are the 5 groups of Ornithopods? | Hypsilophodontids, dryosaurids, camptosaurids, iguanodontids, hadrosaurids,
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| Which one of these 5 groups was Iguanodon classified in? | iguanodontids
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| What are some characteristics of hadrosaurids? | Large-bodied, long skulls expanded into duck-bills.
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| Which of the 5 groups divided into 2? What were they? | Hadrosaurids? Crested and non-crested
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| What were the non-crested hadrosaurids called? | Hadrosaurines.
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| Crested forms were called? | lambeosaurines
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| What is so special about hadrosaurids teeth? What did it do? | dental batteries, multiple rows of packed teeth that formed a continuous surface for crushing and grinding food. Most derived chewing system of all dinos.
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| Were ornithopods spread widely across the world? | Yes, they were very successful.
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| Throughout time, what happened to ornithopods? | dramatic increase in body size, snout becomes longer and broader (toothless in the front), increase in cheek teeth, expansion of bones in the nasal region, forelimbs became longer, hands reduce outer digits,increased brain size, species-specific noses
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| How did hadrosaurs live? | They nested in colonies. Fossil evidence suggests they lived in herds sorted into a dominance hierarchy.
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Created by:
Chelseagirl2508
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