Theropod meaning beast feet are a group of bipedal dinosaurs. Although they were primarily carnivorous, a number of theropod families evolved herbivory during the Cretaceous Period. Theropods first appeared during the Carnian age of the Late Triassic about 230 million years ago and were the sole large terrestrial carnivores from the Early Jurassic until the close of the Cretaceous, about 65 million years ago. Today, they are represented by the 9,300 living species of birds, which evolved in the Late Jurassic from small specialized coelurosaurian dinosaurs.
A typical feature of Monolophosaurus was a single comb that was on its head. The dinosaur was also named after this: The German translation of Monolophosaurus means `lizard with a comb`.
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