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Serratolamna

Serratolamna was a genus of prehistoric shark which lived from the late Cretaceous Period to the Eocene Epoch of the Paleogene Period, approximately 75-45 million years ago. The genus is currently divided into several species, of which the species S…. Read More ›

Didelphodon

Didelphodon, known largely from its appearance as a background character in the final episode of the 1999 BBC series Walking with Dinosaurs, was a large prehistoric mammal which lived in North America during the late Cretaceous Period 73-66 million years… Read More ›

Cimoliasaurus

Cimoliasaurus, meaning “chalk lizard” due to its fossils being found within layers of chalk, was a genus of elasmosaurid plesiosaur which lived at the end of the Cretaceous Period 70-66 million years ago, making it one of the last plesiosaurs… Read More ›

Mosasaurus

Mosasaurus was a genus of fully-aquatic marine lizards which lived throughout the world’s oceans during the late Cretaceous Period approximately 75-66 million years ago. Fossils of this animal were first discovered in 1764 within a chalk mine in the town… Read More ›

Gualolepis

Gualolepis was a prehistoric freshwater fish which lived in western Argentina during the middle of the Triassic Period 235-234 million years ago. Only two specimens of this fish have been found (collection ID codes: PULR 106 and PULR 107), and… Read More ›

Challaia

Challaia was a genus of prehistoric freshwater fish which lived in South America during the early and middle Triassic Period 240-230 million years ago. Its fossils have been found within several geological formations in western Argentina. Challaia belonged to the… Read More ›