Was recently described, after analyzing newfound bones.
It was only 40 ft long, and weighed a mere 10 tons, or about.
And it had superior sight and hearing, with fat teeth and a broad snout.
More C-T scan techniques helped to study its small brain,
Which, the scientists explained, the size of a lime could attain.
It walked with its head pointing down, at 45 degrees inclined,
And it foraged on the ground, its vegetarian food to find.
Its bones were unearthed near Sarmiento, which earned its newfound fame,
Sarmientosaurus mussachioi is its scientific name.