Barosaurus

Barosaurus 'heavy lizard' was a large Sauropod from the Late Jurassic Period, that could grow over 26 metres long and weigh 20 tonnes.

More on Barosaurus - Barosaurus on Wikipedia

Jurassic Park Franchise
Barosaurus doesn't appear in the actual movies or books.

Jurassic Park inspired games

 * Barosaurus is number 56 of the Herbivore Threes that can be created in the game Jurassic Park III: Park Builder.