Allosaurus

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Classification:

Theropod dinosaur

Time:

The late Jurassic Period (Kimmeridgian to Tithonian)

Diet:

Carnivorous (flesh-eating)

Length:

12 meters

Weight:

2000 kilogram

Where found:

U.S.

Describer:

Othniel Charles Marsh, 1877

Description:

Allosaurus is one of the famous theropod dinosaurs, maybe the most fearful dinosaur ever lived. Allosaurus had a large skull. Fossils were found in Utah.

Dicraeosaurus

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Classification:

Diplodocoid sauropod dinosaur

Time:

Late Jurassic

Diet:

Herbivores

Length:

20 meters

Weight:

10000 kilograms

Where found:

Fossils have been discovered in the rocks of Tendaguru Hill in Tanzania.

Describer:

Werner Janensch, 1914

Description:

Dicraeosaurus is a small sauropod dinosaur. This dinosaur lived in the Late Jurassic. Dicraeosaurus had a large head. From fossils, Dicraeosaurus is thought to have had a small sail on its back. This sail was used to regulate temperature.

Diplodocus

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Classification:

Diplodocid sauropod dinosaur

Time:

The end of the Jurassic Period

Diet:

Herbivores

Length:

30 meters

Weight:

Unknown

Where found:

U.S.

Describer:

Othniel Charles Marsh, 1878

Description:

In 1877 S. W. Williston first discovered the fossils of Diplodocus. Diplodocus lived in what is now north America at late Jurassic Period. Diplodocus might be the most famous dinosours, with its long neck and tail. This dinosaur was the longest dinosaur.

Diplodocus's nostrils were at the top of its head and it had peg-like teeth. All legs had elephant-like, five-toed feet. For protection, they had a thumb claw on each foot. Diplodocus had a row of spines running down its back.






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Triceratops

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Classification:

Horned dinosaurs

Time:

the late Maastrichtian stage of the Late Cretaceous Period

Diet:

Herbivores

Length:

9 meters

Weight:

6-12 tons

Where found:

Canada

Describer:

Othniel Charles Marsh, 1889

Description:

Triceratops is one of the most famous dinosaurs. Bearing a large body frill and three horns on its large four-legged body. It resembled the modern rhinoceros.