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Coelophysis bauri (Cope, 1887) theropod dinosaur from the Triassic of New Mexico, USA. This is a remarkable complete skeleton of the small early theropod Coelophysis. It comes from a nearly monospecific concentration of numerous complete to disarticulated skeletons in reddish-colored fluvial siltstones, often called a "Coelophysis graveyard". This occurrence has been interpreted as a carcass-jammed channel filling following mass mortality of dinosaurs by regional drought (see Schwartz & Gillette, 1994). Stratigraphy: Rock Point Member, Chinle Formation, Upper Triassic Locality: Whitaker Quarry (Coelophysis Quarry), Ghost Ranch, Rio Arriba County, northern New Mexico, USA Some info. from: Hunt, A.P. & S.G. Lucas. 1991. Rioarribasaurus, a new name for a Late Triassic dinosaur from New Mexico (USA). Paläontologische Zeitschrift 65: 191-198. Schwartz, H.L. & D.D. Gillette. 1994. Geology and taphonomy of the Coelophysis Quarry, Upper Triassic Chinle Formation, Ghost Ranch, New Mexico. Journal of Paleontology 68: 1118-1130. Theropod were small to large, bipedal dinosaurs. Almost all known members of the group were carnivorous (predators and/or scavengers). They represent the ancestral group to the birds, and some theropods are known to have had feathers. Some of the most well known dinosaurs to the general public are theropods, such as Tyrannosaurus, Allosaurus, and Spinosaurus.

Neotype skeleton of Massospondylus carinatus (BP/1/4934) in left lateral (A) and right lateral (B) views. Scale bars = 50 mm.

Reconstructed skeleton of Tenontosaurus, from the Cloverly Formation.

Mounted skeleton of Stegosaurus stenops (specimen NHMUK PV R36730, "Sophie"/"Sarah") in right lateral view at the Natural History Museum, London.

The saltasaurine sauropod Neuquensaurus australis, from the Anacleto Formation (Upper Cretaceous), Patagonia, Argentina. Restoration of the skeleton mounted at the Museo de La Plata, Argentina.

Camarasaurus lentus (Marsh, 1889) sauropod dinosaur from the Jurassic of Utah, USA (public display, CM 11338, Carnegie Museum of Natural History, Pittsburgh, Pennsylvania, USA). This is a near-complete juvenile sauropod dinosaur in the original fluvial sandstone matrix - such skeletons are extremely rare. Classification: Animalia, Chordata, Vertebrata, Dinosauria, Sauropodomorpha, Camarasauridae Stratigraphy: Brushy Basin Member, Morrison Formation, Upper Jurassic, 151 Ma Locality: Carnegie Quarry, Dinosaur National Monument, northeastern Utah, USA Sauropod dinosaurs were the largest terrestrial animals ever. They all have the same basic body plan: large body with four walking legs, very long neck & tail, and a small head relative to body size. Sauropods were herbivores, and are often perceived as holding their heads & necks up high to reach vegetation normally out of reach to other organisms. Modern reconstructions of many sauropod species depict them with heads and necks held close to the horizontal, or at low angles above the horizontal.

Camarasaurus lentus (Marsh, 1889) sauropod dinosaur from the Jurassic of Utah, USA (public display, CM 11338, Carnegie Museum of Natural History, Pittsburgh, Pennsylvania, USA). This is a near-complete juvenile sauropod dinosaur in the original fluvial sandstone matrix - such skeletons are extremely rare. Classification: Animalia, Chordata, Vertebrata, Dinosauria, Sauropodomorpha, Camarasauridae Stratigraphy: Brushy Basin Member, Morrison Formation, Upper Jurassic, 151 Ma Locality: Carnegie Quarry, Dinosaur National Monument, northeastern Utah, USA Sauropod dinosaurs were the largest terrestrial animals ever. They all have the same basic body plan: large body with four walking legs, very long neck & tail, and a small head relative to body size. Sauropods were herbivores, and are often perceived as holding their heads & necks up high to reach vegetation normally out of reach to other organisms. Modern reconstructions of many sauropod species depict them with heads and necks held close to the horizontal, or at low angles above the horizontal.

Perot Museum Reconstructed skeleton of Convolosaurus in the foreground, with an adult Tenontosaurus behind it. Skeletons are from the Cloverly Formation of Montana.

Mounted skeleton (cast) of Majungasaurus crenatissimus, Stony Brook University.

Mounted skeleton (cast) of Majungasaurus crenatissimus, Stony Brook University.

Collage of six tyrannosaurids, clockwise from top left: Tyrannosaurus, Daspletosaurus, Tarbosaurus, Gorgosaurus, Zhuchengtyrannus and Alioramus. This montage was made for the article Tyrannosauridae on Wikipedia. File:OriginalPecks.jpg File:Daspletosaurus at the Science Center of Iowa.jpg File:Tarbosaurus baatar skeleton.jpg File:Alioramus Te Papa.jpg File:Zhuchengtyrannus mount.jpg File:Gorgosaurus in Japan.jpg

Collage of four ceratopsids, clockwise from top left: Titanoceratops, Styracosaurus, Triceratops and Utahceratops. These files are already on Commons with their respective licenses. This montage was made for the article Ceratopsidae on Wikipedia. File:Titanoceratops.jpg File:Torosaurus, is it? (20752673005).jpg File:Triceratops Skeleton Senckenberg.jpg File:Utahceratops gettyi 1 salt lake city.jpg

Triceratops skeleton at the Smithsonian museum of Natural History

Duck-billed dinosaurs at the Royal Ontario Museum. A Maiasaura skeleton is visible on the foreground, with two Maiasaura juveniles at the foot of the skeletal mount. On the background, flushing with the wall, there's the two-dimensional mount of a Gryposaurus specimen. The unidentified skull of another duck-billed dinosaur is visible on the low right corner of the photograph.

Duck-billed dinosaurs at the Royal Ontario Museum. A Maiasaura skeleton is visible on the foreground, with two Maiasaura juveniles at the foot of the skeletal mount. On the background, flushing with the wall, there's the two-dimensional mount of a Gryposaurus specimen. The unidentified skull of another duck-billed dinosaur is visible on the low right corner of the photograph.

Apatosaurus louisae (CM 3018) mounted fossil skeleton on display at the Carnegie Museum of Natural History, Pittsburgh, PA