Argentinosaurus

Information
Argentinosaurus huinculensis was a species of titanosaur that roamed South America approximately 95 million years BCE. Known from vertebrae and leg bones, Argentinosaurus is estimated to have grown up to 30-39 meters in length (98 to 130 feet), and weighed up from 80 to 100 tons when fully grown, among the heaviest land vertebrates to roam the Earth. Although sheer size meant that adults didn't have any natural predators, babies and juveniles would still have to worry about the abelisaur Skorpiovenator and the carcharodontosaur Mapusaurus thoughout development. An Argentinosaurus hatchling is estimated to have to grow 25,000 times their initial size to reach their final adult size, taking about 15 years to grow.

Design
Argentinosaurus huinculensis is completely hairless with a body that was covered in grey, wrinkled skin. The undersides of this dinosaur are shown to be lighter than the top of it, an example of countershading, seen in many creatures today.