reptile

Kepodactylus

NOTE: This article was originally published on August 3, 2023. It was substantially revised on February 3, 2026. Kepodactylus was a pterosaur which lived in western North America during the late Jurassic Period 155-152 million years ago. In 1992, a nearly-complete Stegosaurus skeleton… Read More ›

Euhelopus

Euhelopus was a sauropod dinosaur which lived in eastern China during the early Cretaceous Period approximately 130-112 million years ago. Fossils of this animal were found in the early 20th Century within the rocks of the Meng-Yin Formation within Shandong… Read More ›

Alectrosaurus

Alectrosaurus was a small tyrannosauroidean theropod dinosaur which lived in Mongolia during the middle of the Cretaceous Period around 95 million years ago. It is known from partial remains belonging to several individuals, but their incompleteness makes it difficult to… Read More ›

Gigantoraptor

Gigantoraptor was a massive 25-30 foot long oviraptorosaurian theropod dinosaur which lived in eastern Asia (and possibly in North America) during the middle of the Cretaceous Period. The fossils of this enormous bird-like dinosaur, consisting of a partial skeleton, were… Read More ›

Hylaeosaurus

Hylaeosaurus was a 15 foot long armored dinosaur which lived in England (and possibly elsewhere in Europe) during the early Cretaceous Period approximately 135 million years ago. The bones of this animal were discovered in July 1832 within Tilgate Forest,… Read More ›

Toxolophosaurus

Introduction Allow me to introduce you to Toxolophosaurus, “the bow-crested lizard”, which lived in Montana during the early to middle Cretaceous Period approximately 135-115 million years ago. Despite its name, Toxolophosaurus wasn’t either a dinosaur or a lizard. Instead it… Read More ›

Acamptonectes

Acamptonectes densus was a 4 meter (13 foot) long ichthyosaur which swam in the seas around western Europe during the early Cretaceous Period 131-129 million years ago. The first specimen was found in the seaside village of Speeton, Yorkshire, England… Read More ›

List of My Articles on the Cedar Mountain Formation

The reconstructed skull of Utahraptor, on display in Brigham Young University’s Museum of Paleontology. Photo by Jaren Wilkey of Brigham Young University (January 26, 2018). Creative Commons Attribution-Share Alike 4.0 International license.https://commons.wikimedia.org/wiki/File:BYU_Utahraptor_skull.jpg. The Cedar Mountain Formation is a North American geological formation which… Read More ›