Prehistoric

Eocaecilia

Eocaecilia was a 6 inch long worm-like amphibian which lived in Arizona during the early Jurassic Period 190 million years ago. An astounding forty partial specimens have been uncovered of this animal, two of which are nearly-complete skulls, while the… Read More ›

Protosuchus

Protosuchus richardsoni was a 3 foot long primitive crocodylomorph which lived in North America during the early Jurassic Period 200-195 million years ago. Fossils of it have been found within the upper part of the Moenave Formation in northern Arizona…. Read More ›

Segisaurus

Segisaurus was a 3 foot long theropod dinosaur which lived in northern Arizona during the early Jurassic Period 180 million years ago. Only one fragmentary skeleton has been found, discovered in 1933 within the Navajo Sandstone in Tsegi Canyon on… Read More ›

Chinlea

Chinlea was a freshwater coelacanth fish measuring 2.5 feet long which lived in North America during the late Triassic Period approximately 210-201 million years ago. Fossils which might belong to Chinlea have also been found in rocks dating to the… Read More ›

Prognathodon

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 ›

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 ›