Mesozoic

Shonisaurus

Shonisaurus was an absolutely gargantuan ichthyosaur which swam off North America’s Pacific coast during the middle of the Triassic Period 227 million years ago. Shonisaurus was one of the largest ichthyosaurs to have existed, measuring 45 feet long. Only a… Read More ›

Kayentatherium

Kayentatherium, “the beast from the Kayenta Formation”, was a cynodont (one of a group of mammal ancestors which are sometimes called “mammal-like reptiles”) which lived in Arizona during the early Jurassic Period approximately 185-180 million years ago. Kanyentatherium was big,… Read More ›

Hauffiosaurus

Hauffiosaurus was a genus of plesiosaur which lived around England and Germany during the early Jurassic Period. There are currently three known species: H. zanoni, H. tomistomimus, and H. longirostris. Of these, Hauffiosaurus longirostris was the largest, measuring almost 16… Read More ›

Macroplata

Macroplata was a 15 foot long plesiosaur which lived around England during the early Jurassic Period 199 million years ago. In either late 1927 or early 1928, a plesiosaur skeleton was discovered in a limestone quarry in Harbury, Warwickshire, England…. Read More ›

Phaedrolosaurus

Phaedrolosaurus, meaning “elated lizard”, was a species of dromaeosaurid raptor dinosaur which lived in western China during the early Cretaceous Period approximately 130-120 million years ago. In 1963, a team of local geologists were exploring an area near the town… Read More ›

Scutellosaurus

Scutellosaurus, “the little shield lizard”, was a small 4.4 foot long armored dinosaur which lived in Arizona during the early Jurassic Period approximately 185 million years ago. At present, Scutellosaurus is the most common dinosaur known from the Kayenta Formation…. Read More ›

Temnodontosaurus

Temnodontosaurus was a massive 30 foot long ichthyosaur which lived in the seas around western Europe during the early Jurassic Period approximately 200-180 million years ago. The time from the middle Triassic to the early Jurassic Periods, approximately 240-175 million… Read More ›

Plesiosaurus

Plesiosaurus was a 10 foot long marine reptile which swam in the seas around England during the early Jurassic Period about 195 million years ago. During the early 19th Century, isolated fossil bones were discovered scattered in various locations on… Read More ›