Prognathodon was a multi-speciate genus of mosasaur which lived around North America, Europe, and Africa during the Campanian and Maastrichtian Stages of the late Cretaceous Period approximately 80-66 million years ago. Prognathodon is known for possessing massively-built jaws and robust… Read More ›
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Paranomotodon
Paranomotodon, whose name means “near/almost Anomotodon“, was a primitive thresher shark which lived during the middle and late Cretaceous Period, circa 95-66 million years ago. Anomotodon was an extinct species of goblin shark, and fossil shark teeth which were found… Read More ›
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 ›
Apsopelix and Pelecorapis: Two Separate Genera, Or Just One?
Introduction Apsopelix and Pelecorapis were two genera of closely-related prehistoric saltwater fish which lived during the middle to late Cretaceous Period. Fossils of Apsopelix have been found in England, France, and in the American states of Montana, South Dakota, Colorado,… Read More ›
Siats
Introduction Siats, whose name is in reference to a monster from native Ute folklore, was a large meat-eating dinosaur which lived in Utah during the middle Cretaceous Period 98 million years ago. As far as we know, Siats was the… Read More ›