Dinosaur Bundle with 10 detailed Dinosaurs made for 3D-Printing. It's an STL file. include +Allosaurus +Ankylosaurus +Plesiosaurus +Pteranodon +T-rex +Triceratops Dinosaurs are a diverse group of reptiles of the clade Dinosauria. They first appeared during the Triassic period, between 245 and 233.23 million years ago