1. Who are the ornithopods? What are the diagnostic characters of Ornithopoda? How are ornithopods related to other ornithischians?
2. What are the major divisions of Ornithopoda, and what are their diagnostic characters?
3. How could a single ornithopod be both bipedal and quadrupedal?
4. Describe the hands of non-hadrosaurid iguanodontians. How did those differ from the hands of hadrosaurids?
5. Highlight what is known of nests and nesting in ornithopods.
6. How did chewing in heterodontosaurids differ from that of euornithopodans?
7. What is pleurokinesis? How did it function in the jaws of hadrosaurids?
8. Name another vertebrate with a kinetic skull.
9. Why is it that most paleontologists now think that hadrosaurid head structures were related to intraspecific competition and/or sexual selection?
10. Give a non-dinosaur example of a K-strategist, and an r-strategist.
11. How does ornithopod diversity parallel gymnosperm and angiosperm diversity?
12. Use a cladogram to make the argument that a K-strategy evolved at least two times in the history of vertebrates.
meat, might, and magnitude
Saurischians include the smallest of dinosaurs and the largest animals that ever lived on land; the most agile and ferocious of predatory dinosaurs and the most ponderous of plant-eaters; the brightest and, evidently, the most dim-witted of dinosaurs; the most Earth-bound and the most aerial. And stealth saurischians, birds, remain with us today, very much alive and well!
Saurischians don't have an obvious family resemblance, and you could be forgiven if you were reluctant to suppose that they are all more closely related to each other than they are to anything else. But our best evidence suggests that they are.
Was this article helpful?