What is the difference (body structure) between a triassic and Cretaceous dinosaur?

Answer 1

You have the entire Jurassic period in-between... in the early Triassic Period, there were no dinosaurs at all. That's the era of the first dinosaurs, and when they later appeared on the scene, they were much, much smaller than the dinosaurs of the Jurassic and Cretaceous periods. The largest one was low to the ground, walked on two feet, and measured about 27 feet in length. Most of these early dinosaurs died off after a cataclysmic event occured, possibly volcanic in nature. The Eoraptor, the first known dinosaur, is from this period. He was a little fella, only about 3 feet long, living in what is now Argentina.

By the time we reached the Cretaceous, we had arrived at the heyday of the dinosaurs... this is the age of the T-Rex (although the movie Jurassic Park would have you believe otherwise... but the T-Rex didn't show up until the later Cretaceous.) The triceratops is also from this period. Many of the huge creatures now emblematic of the dinosaurs in general came from the Cretaceous. In general, these are much larger creatures, where body structure is concerned.

Answer 2

Check out the website for the Royal Tyrell Museum in Drumheller, Alberta, Canada. They have a bunch of dead lizards there.

Answer 3

I can't answer this question; I'm an ANTHROPOLOGIST. We don't study dinosaurs. Think about it, then take it to another category.