Acrocanthosaurus was a dinosaur of the Cretaceous period, remains of which were first discovered in 1950 in Oklahoma, USA, Acrocanthosaurus was a carnivore, about 12 metres long, believed to walk semi-upright on two hind legs and had 30 cm long spines on its backbone which may have supported a ridge or sail along its back. Research Acrocanthosaurus
Albertosaurus was a dinosaur from the late Cretaceous period, remains of which were first found in 1905 in the USA. A carnivore. Albertosaurus walked on its hind legs and had small, relatively poorly formed forward legs. In 1923a skeleton of a juvenile Albertosaurus was discovered and at the time identified as a distinct species and given the name Gorgosaurus, however it was later found that the animal grew heavier and stronger as it aged, and the skeleton was that of an Albertosaurus. Research Albertosaurus
Baryonyx was a dinosaur of the Cretaceous period. Remains of Baryonyx were found in 1983 in a clay pit in southern England. Baryonyx was about 9 metres long, had a long and flat skull similar to that of a crocodile, and a large slashing claw, though whether the claw was on the foot or hand is not known. The presence of fish scales in the stomach of the specimen discovered suggest a carnivoredinosaur that ate fish, and possibly other animals. Research Baryonyx
Coelurus was a small dinosaur of the Jurassic period. Coelurus was a carnivore, about two metres long, with a long tail comprised of hollow bones. The bones of Coelurus were light, the hands had three fingers, a short thumb and the other two digits served with long, sharp, curved claws. The first remains of Coelurus were discovered in about 1879. Research Coelurus
Daspletosaurus was a dinosaur of the Cretaceous period. Daspletosaurus was a carnivore that walked on its hind legs, had two weak arms furnished with two fingers on each, a huge head with dagger-like teeth and was about 9 metres long. The first nearly-complete skeleton of a Daspletosaurus was discovered in 1921 in Alberta, Canada among remains of other dinosaurs including Albertosaurus, which Daspletosaurus was at first identified as. However, by 1970 it was apparent that while similar, Daspletosaurus was a distinct animal to Albertosaurus, being heavier and with larger fore limbs. Research Daspletosaurus
Dromaeosaurus was a small dinosaur of the Cretaceous period. Remains of
Dromaeosaurus were first discovered in 1914 at Red Deer River in Canada. It was a carnivore, about 1,8 metres long, and walked on its hindlegs the foot of which was equipped with a special sharp claw. Research Dromaeosaurus
Dryptosaurus was a dinosaur of the Cretaceous period. A carnivore, it was about 6 metres long and walked on its hind legs and there were at least twelve species, but little else is known about it. Only one skeleton of Dryptosaurus has been found, that was found in North America in 1866. Other remains have been found across North America. Research Dryptosaurus
Elaphrosaurus was a dinosaur of the Jurassic period. Remains of Elaphrosaurus have been found, but all lack the skull, and so it is impossible to determine if it was a herbivore or carnivore, though remains of later similar dinosaurs were toothless herbivores. However, it stood about 2 metres tall, was about 3.5 metres long and walked on its long slender hind legs. It had short arms and both the feet and hands had three digits. Research Elaphrosaurus
The Probert Encyclopaedia was designed, edited and programed by
Matt and Leela Probert
Abbreviations
Research Abelisaurus
