Europasaurus holgeri Polacanthus The head of Albertosaurus was

The head of Albertosaurus was large and powerful

7 toneladas

" These spines were sharp at the tip and were probably used as a defense against predators

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

but also possessed reptilian features such as teeth

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.