Temporal range: Late Cretaceous
Alamosaurus was a quadrupedal, plant-eating dinosaur that lived during the late Cretaceous period, about 73 million to 65 million years ago. It was a sauropod and a titanosaurid (it may have had some body armor).
Alamosaurus was a long-necked, whip-tailed dinosaur. It was about 69 feet (21 m) long and weighed perhaps 33 tons (30000 kg). Fossils have been found in New Mexico, Texas, and Utah. Fossils include fragmentary skeletons (and no skulls).