ERTH 2401 Lecture : Lecture17- Dinosaurs Role in Paleogeography .doc
11 Apr 2012
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Document Summary
Patagonia have more fossil material that tells us more about dinosaurs: they lived together and we can reconstruct that ecosystem, rare fossil of interspecific behavior, ex. One biting the other, protected themselves from predators. Proceratops: ex. lived together and died together in combat position. Geographic distribution: endemism, endemic taxa, indigenous taxa, continental separation, taxa which occur a specific geographic area and are related to certain. Kangaroo: why are they endemic to australia, the moment australia separated the animals stayed in australia and they evolved. Migration routes are shut down: mountain range forms certain animals are not able to cross over. Barriers of faunal migration: what period of the mesozoic has the most endemism , cretaceous. Temporal distribution: a new dinosaur genus occurred every 4-8 million years, possibly exceeded at time of mass extinctions. Ceratopsian dinosaurs: relatively complete fossil record, a new species every 1. 9 million years, stegosaurs produces 1 new species every 5. 6 million years.
