The Morrison Formation of western North America is my favorite geological / paleontological formation to study. Within these rock layers, which are dated to the late Jurassic Period from approximately 155 to 145 million years ago, are found the fossils of some of the most famous dinosaurs known, such as Allosaurus, Brachiosaurus, Stegosaurus, and Diplodocus. However, dinosaurs were not the only animals which lived here. This was a vibrant ecosystem home to all kinds of fish, amphibians, reptiles, and mammals.

Since I set up this website in 2013, I have written several articles concerning the animals which lived in the Morrison Formation. It can be a bit difficult for me to keep track of what I’ve already written about and what I haven’t yet, so I’ve decided to compile all of my articles here into a comprehensive list. That way, it’s easy for myself and indeed anybody to quickly use this as a reference guide to look up info about the animals of late Jurassic North America.

FISH

• Morrolepis (August 31, 2019)
• Ceratodus: The Iconic Lungfish of the Mesozoic Era (February 10, 2021)

REPTILES

• Dermodactylus (July 3, 2013)
• Harpactognathus (August 30, 2019)
• Macelognathus (April 9, 2020)
• Hallopus (April 14, 2020)
• Fruitachampsa, the crocodile-bear-cat of the Morrison Formation (December 19, 2020)

MEAT-EATING DINOSAURS

• Allosaurus (November 12, 2013)
• Ceratosaurus (November 27, 2013)
• Torvosaurus: The Grizzly Bear of the Jurassic (August 8, 2015)
• Ornitholestes with feathers (November 28, 2016)
• Coelurus (June 7, 2018)
• Ceratosaurus Osteoderms: A Revised Perspective (April 6, 2020)
• Coelurus again (April 26, 2020)
• Allosaurus head (May 28, 2020)
• Allosaurus, revised (July 10, 2020)

PLANT-EATING DINOSAURS

• The Changing Face of Camptosaurus (November 24, 2013)
• Camarasaurus (March 7, 2015)
• Othnielia (September 15, 2019)
• Haplocanthosaurus: An Enigmatic Sauropod from the Late Jurassic Period (September 27, 2019)
• Dryosaurus (April 8, 2020)
• Camptosaurus (April 12, 2020)
• Some Morrison Formation Sauropods: Apatosaurus, Barosaurus, and Diplodocus (May 12, 2020)
• Stegosaurus (August 7, 2020)
• Brachiosaurus (April 28, 2021)
• Gargoyleosaurus (August 25, 2021)

Categories: Paleontology, Uncategorized

Tags: crocodilian, crocodyliform, dinosaur, fish, Jurassic Period, Late Jurassic, Morrison Formation, North America, ornithopod, paleo-art, paleontology, Prehistoric, pterosaur, reptile, sauropod, sauropodomorph, Sauropodomorpha, theropod, thyreophoran