Alamosaurus
Alamosaurus (; meaning "Ojo Alamo lizard") is a genus of titanosaurian sauropod dinosaurs, containing a single known species, Alamosaurus sanjuanensis, from the late Cretaceous Period of what is now southern North America. Isolated vertebrae and limb bones indicate that it reached sizes comparable to "Argentinosaurus" and "Puertasaurus", which would make it the largest dinosaur known from North America. Its fossils have been recovered from a variety of rock formations spanning the Maastrichtian age of the late Cretaceous period. Specimens of a juvenile "Alamosaurus sanjuanensis" have been recovered from only a few meters below the Cretaceous-Paleogene boundary in Texas, making it among the last surviving non-avian dinosaur species.
William May (artistic director)
He chose Sonny Tilders, one of the film and television industries' leading professionals in the field of animatronic puppetry, to head the development of the dinosaurs. May designed the fifteen life-size dinosaurs used in the production. Ten species of dinosaurs are included in the show, including the Liliensternus, Plateosaurus, Allosaurus, Stegosaurus, Utahraptor and Torosaurus. The largest dinosaur in the production, the Brachiosaurus, which most resembles the cranes which inspired the show, measures 56 feet long and 36 feet tall.