Pachycephalosaurus Theropoda Estas estructuras han sido interpretadas

Estas estructuras han sido interpretadas como "proto-plumas" o apéndices filamentosos similares a plumas

incluyendo otros dinosaurios y posiblemente pequeños reptiles y mamíferos

This ancient marine mammal is considered one of the first ancestors of modern cetaceans

in some species

Pachycephalosaurus Theropoda Estas estructuras han sido interpretadasPachycephalosaurus (P. wyomingensis `Thick headed Lizard) was a browsing herbivorous dinosaur that lived during the Late Cretaceous period, approximately 70 million years ago. It was a bipedal dinosaur with a large, rounded skull, with a thick cranial vault that was probably used in fights for dominance between males. Pachycephalosaurus was around 5 meters long, 2. 5 meters tall and weighed around 2,000 kilograms, and although its exact diet is