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.
Aramberri, Nuevo León
In 2002, Aramberri, attracted national and international media attention when it was announced the discovery of a large Pliosaur fossil, often referred by the press as "the Aramberri Monster", as they believed it looks like the Lochness Monster. The specimen is actually a very large pliosaur, possibly reaching 15 m (50 ft) in length. The media published exaggerated reports claiming it was 25 m (80 ft) long, and weighed up to 150,000 kg, which would have made it the largest predator of all time. This error was dramatically perpetuated in BBC's documentary series "Walking with Dinosaurs", which also prematurely classified it as a Liopleurodon ferox. On January 7, 2003, the fossil was transferred and reconstructed at the Natural History Museum of Karlsruhe in Germany, and was kept in exhibition until 2003, when it was transferred to the Museo del Desierto in Saltillo, Coahuila. The fossil is on exhibition at the Museo de historia Mexicana in Monterrey.