Irritator challengeri Variant:Unprimed The discovery of Citipati osmolskae

The discovery of Citipati osmolskae has been fundamental to better understand the evolution of birds and their reproductive behavior

a region exceptionally rich in fossil marine vertebrates from the South American Pacific

Platecarpus se alimentaba principalmente de peces y otros animales marinos

seasonal climate in the western part of the ancient Laramidia Plate during the Late Campanian

Irritator challengeri Variant:Unprimed The discovery of Citipati osmolskaeIrritator challengeri is a species of spinosaurid theropod dinosaur that lived during the Early Cretaceous period, approximately 110 million years ago, in what is now Brazil. Its name comes from the Latin "irritator," referring to the frustration of paleontologists upon discovering that the original fossil had been altered with plaster by the collectors who found it, and "challengeri" in honor of Professor Challenger, a fictional character created by