Amazonsaurus (Meaning "Amazon River Lizard") is a primitive diplodocoid that lived in Brazil during the Early Cretaceous period. However, most known diplodocids are found in North America. (like Diplodocus and Apatosaurus)
This dinosaur maybe had a similar spiny build to that of Amargasaurus, as shown in the artist's description to the side. It's claimed to be around the length of T. rex, around 12 meters and a 6 foot adult could stand to its chest in a size description. It may have weighted around 3-5 tons in weight.