ARGENTINOSAURUS
(pronounced ahr-gen-TEEN-oh-SAWR-us) was a 135 feet  long titanosaurid long neck sauropod. It was an enormous, long-necked, long-tailed, quadrupedal, plant-eater from Argentina, from about 75 million years ago.. Argentinosaurus,  "Argentina Lizard," was named by  Coria Bonaparte in 1993. It is known from fossilized back vertebrae, tibia, ribs and sacrum. It may be the absolute king of the dinosaurs size wise. How much the dinosaur had to eat to keep it's immense size is open to speculation.