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Lecture 23 Study Guide

Lecture 23 Study Guide - a Only when warmer than usual 3...

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Lecture 23 Study Guide 1. How many lineages of marine reptiles were there? a. Sauropterygians i. Placodonts ii. Plesionsaurs iii. Biggest group b. Ichthyosaurs i. 2 nd biggest group ii. Similar to dolphins iii. Huge eyes c. Mosasaurs i. 3 rd biggest ii. Worst predators in ocean d. Mesozoic marine reptiles i. Sauropterygians, Ichthyosaurs, Mosasaurs e. Thalattosuchians i. Marine crocodiles f. Sea turtles i. Only surviving member 1. Out of all these groups g. Thalattosaurs i. Discovered in CA h. Pleurosaurs i. No teeth replacement ii. Teeth eroded really fast i. Hupehsuchus
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i. Middle Triassic, a reptile ii. Bony armor j. Easy for reptiles to become marine i. In Mesozoic 2. When did marine reptiles emerge?
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Unformatted text preview: a. Only when warmer than usual 3. What were the major swimming modes? a. Body axis i. Tuna or eel ii. Pursuit 1. Fast cruising speed iii. Ambush 1. Quick acceleration, maneuverability b. Limbs i. Underwater flight ii. Rowing 4. What were the major feeding styles? a. Pierce I, II i. Sharp teeth b. Cut i. Ridges c. Smash d. Crunch e. Crush f. Tooth shape i. Tooth function ii. Prey preference 1. Depends on robustness of teeth 5. How common were shell-eaters? a. Not very common 6. What was the largest marine reptile? a. Ichthyopterygia...
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