Europasaurus holgeri Polacanthus The head of Albertosaurus was

The head of Albertosaurus was large and powerful

which fell into darkness shortly after operations were completed and the mine closed in 1921

suggesting that it was a highly specialized predator

but also possessed reptilian features such as teeth

Aunque los materiales fósiles no son completos

Europasaurus holgeri Polacanthus The head of Albertosaurus wasEuropasaurus holgeri is a species of dwarf sauropod dinosaur that lived during the Late Jurassic, specifically in the Kimmeridgian and Tithonian, approximately 154 150 million years ago. Dwelling in what is now Germany during the Late Jurassic, unlike its giant sauropod relatives, Europasaurus experienced an evolutionary phenomenon known as island dwarfism, where a species' body size decreases due to resource limitations on an island or isolated area.