Pronunciation: An-key-seh-ra-tops. Meaning of name: "Near horned face". Species: A. ornatus. It's possible there may be a second species. Size: Measured between 4 and 6 metres long, 2 metres high and weighing between 1 and 2 metric tonnes. Family: Chasmosaurinae (a sub-family of Ceratopsidae). Diet: Herbivore. Fed on low-growing vegetation. First fossils found: Known from a single, partial skeleton and three partial skulls. First discovered by an expedition to the Red Deer River, Alberta, Canada, led by American palaeontologist, Barnum Brown, in 1912. Named by Mr. Brown in 1914. Lived: 72 to 71 million years ago during the Campanian and Maastrichtian stages of the Late Cretaceous in what is now western Canada.
Pronunciation: Or-ni-tho-less-teez. Meaning of name: "Bird robber". Species: O. hermanni Size: Estimated to have measured around 2 metres long, 0.6 metres tall and weighing between 10 and 16kgs. Family: Ornitholestinae Diet: Carnivore. Likely fed on lizards, small mammals, frogs and hatchling dinosaurs. First fossils found: Known only from a single, partial skeleton discovered by an American Museum of Natural History expedition to the Bone Cabin Quarry in Wyoming in July 1900. Named by American palaeontologist, Henry Fairfield Osborn, in 1903. Ornitholestes is often shown chasing the primitive bird, Archaeopteryx, despite the fact that, even though they lived at the same time, they lived on opposite sides of the world. Lived: 154 million years ago during the Kimmeridgian stage of the Late Jurassic in what is now the western United States.
Pronunciation: Pen-tah-seh-rah-tops Meaning of name: "Five horned face" (palaeontologists mistook its pointed cheek bones for an extra pair of horns). Species: P. sternbergii Size: Between 6 and 7 metres long, 3 metres high and weighing up to 5 metric tonnes. Family: Chasmosaurinae (a sub-family of Ceratopsidae). Diet: Herbivore. Fed on low-growing vegetation. First fossils found: Known from several specimens, the first of which were discovered by American palaeontologist, Charles Hazelius Sternberg in the Fruitland Formation of New Mexico, in 1921. Named by American palaeontologist, Henry Fairfield Osborn, in 1923. Lived: 76 to 73 million years ago during the Campanian stage of the Late Cretaceous in what is now the southwestern United States.
Pronunciation: Ken-tro-saw-rus Meaning of name: "Spiked lizard" Species: K. aethiopicus Size: Between 4.5 and 5.5 metres long, 2 metres high and weighing 1 metric tonne. Family: Stegosauridae. Diet: Herbivore. Fed on low-growing vegetation. First fossils found: Known from at least 50 individuals, the first of which were discovered by the German Tendaguru Expedition in the Tendaguru Formation of Tanzania, East Africa in 1909. Named by German palaeontologist, Edwin Hennig, in 1915, soon after which there was a naming controversy, as the name is very similar to the ceratopisian, Centrosaurus. Lived: 157.3 to 152.1 million years ago during the Kimmeridgian stage of the Late Jurassic in what is now Tanzania, East Africa.
Today's "Dino of the Day!" is the most well-known Theropod from the Late Jurassic: Allosaurus.
Pronunciation: Al-low-sore-us. Meaning of name: "Different lizard" Species: A. fragilis, A. europaeus, A. jimmadseni. Size: Between 8 and 12 metres long, 3 metres tall and weighing around 2.5 metric tonnes. Family: Allosauridae. Diet: Carnivore. First fossils found: Known from several specimens, the first of which was a fragmentary specimen discovered in Colorado in 1869. First named Antrodemus ("Chamber-bodied") by American palaeontologist, Joseph Leidy, in 1870. A second fragmentary specimen named Allosaurus by American palaeontologist, Othniel Charles Marsh, in 1877. In 1920, it was suggested by another palaeontologist, Charles Whitney Gilmore, that Allosaurus and Antrodemus may be the same animal. During the early 1960's, thousands of fossils were discovered at the Cleveland-Lloyd Quarry in Utah and, after studying the bones, it was decided that Allosaurus would be the official name because Antrodemus was based on poor material. Lived: 155 to 145 million years ago during the Kimmeridgian and Tithonian stages of the Late Jurassic in what is now the western, south-central, midwestern and south-western United States.
Pronunciation: Cam-ah-rah-sore-us. Meaning of name: "Chambered lizard", due to the hollow chambers in its vertebrae. Species: C. supremus, C. grandis, C. lentus Size: Depending on the species, measured between 15 and 23 metres long, between 7 and 9 metres tall and weighing between 20 and 47 metric tonnes. Family: Camarasauridae. Diet: Herbivore. Fed on both high and low-growing vegetation. First fossils found: Known from many specimens, the first of which was discovered by Oramel W. Lucas in the Morrison Formation of Colorado in 1877. C. supremus named in the same year by American palaeontologist, Edward Drinker Cope. C. grandis also named in 1877 by Othniel Charles Marsh. C. lentus named by Mr. Marsh in 1889. Lived: 155 to 145 million years ago during the Kimmeridgian and Tithonian stages of the Late Jurassic in what is now the western United States.
Pronunciation: Ed-mon-toe-sore-us Meaning of name: "Edmonton lizard", after the capital city of Alberta, Canada. Species: E. regalis, E. annectens. Size: Between 12 and 15 metres long, 3 metres tall (up to 6 metres tall when standing upright) and weighing between 4 and 9 metric tonnes. Family: Saurolophinae (a sub-family of Hadrosauridae). Diet: Herbivore. Fed on both high and low-growing vegetation. First fossils found: Known from several specimens. First discovered by American palaeontologist, John Bell Hatcher, in the Lance Formation of eastern Wyoming in 1891. Named by Canadian palaeontologist, Lawrence Lambe, in 1917. Over the years, Edmontosaurus has been known by many other names including Agathaumas, Anatosaurus, Anatotitan, Claosaurus,Hadrosaurus, Thespesius and Trachodon. Lived: 73 to 66 million years ago during the Campanian and Maastrichtian stages of the Late Cretaceous in what is now western Canada and the western United States.