Ok, I'm going to try
"Dinosaurs" found in the LBT series that are from the Triassic era:
Ichthyosaur (the sharptooth swimmer from LBT 9)
Quetzalcoatlus (the massive flyer from LBT 7 that comes with Petrie's mother)
Eozostrodon (the mouse-like creature in LBT 4)
Creatures that existed after the cretaceous period:
The Alligator from LBT 10
Ichy (Dill's partner in LBT 4)
and, again, the mouse-like creature, Eozostrodon
Note, I did a bit of research on this question: I didn't know all of this off-hand, lol

Tough question!