Are These Beasts Jurassic, Triassic, or Cretaceous?

What period did Triceratops live during?

What period did the Lystrosaurus live during?

What period did the Plateosaurus live during?

What period did the Tyrannosaurus rex live during?

What period did the Homeosaurus maximiliani live during?

What era did the Pleurosaurus live during?

What period did the Coelophysis live during?

What period did the Velociraptor live during?

What period did the Confuciusornis live during?

What period did the Ichthyornis live during?