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.
Carnegie Museum of Natural History
The museum gained prominence in 1899 when its scientists unearthed the fossils of "Diplodocus carnegii". Today its dinosaur collection includes the world's largest collection of Jurassic dinosaurs and its "Dinosaurs in Their Time" exhibition offers the third largest collection of mounted, displayed dinosaurs in the United States (behind the Smithsonian's National Museum of Natural History and the American Museum of Natural History). Notable specimens include one of the world's only fossils of a juvenile "Apatosaurus", the world's first specimen of a "Tyrannosaurus rex", and a recently identified species of oviraptorosaur named "Anzu wyliei".