reptile

Hallopus

This is Hallopus victor, a 3-foot long reptile that lived in the Morrison Formation of western North America during the late Jurassic Period approximately 150 million years ago. Hallopus belonged to a group of reptiles called the “sphenosuchians” a group… Read More ›

Camptosaurus

This is Camptosaurus dispar, a 20 foot long plant-eating dinosaur from the Morrison Formation of western North America during the late Jurassic Period. In most paleo-art, it seems that the only purpose in life for this unfortunate animal is to… Read More ›

Macelognathus

This is Macelognathus vagans. This animal lived in the Morrison Formation of western North America during the late Jurassic Period approximately 150 million years ago. Macelognathus belongs to a group of animals called the “sphenosuchians”, which is a group that’s… Read More ›

Dryosaurus

NOTE: This article was originally posted on April 8, 2020. It was substantially updated on December 14, 2022. This is Dryosaurus, a 10 foot long plant-eating ornithopod dinosaur from the Late Jurassic Morrison Formation of western North America, and possibly… Read More ›

Othnielia

Othnielia rex was a small ornithopod dinosaur found in the Morrison Formation, a famous geological formation spanning a large chunk of the western United States which is dated to the late Jurassic Period, 155-145 million years ago. It is here… Read More ›

Harpactognathus

Harpactognathus was a rhamphorhynchid pterosaur which lived in the Morrison Formation of western North America during the late Jurassic Period. It was one of the largest pterosaurs that lived in North America during that time. Although it is only known… Read More ›

Liopleurodon

The middle to late 19th Century can arguably be seen as the glory days of paleontology. While this time frame is often associated with the discovery of dinosaurs and the so-called “Bone Wars” of the American West, discoveries were also… Read More ›