Alamosaurus aləmoh-SƆːRUHS

Alamosaurus (; meaning “Ojo Alamo lizard”) is a genus of titanosaurian sauropod dinosaurs containing a single known species, Alamosaurus sanjuanensis, from the Maastrichtian age of the Late Cretaceous period in what is now southwestern North America. It is one of the few known titanosaurs to have inhabited North America after the nearly 30-million-year absence of sauropods from the North American fossil record (“sauropod hiatus”) and probably represents an immigrant from South America.

Adults would have measured around 26 m long, 5 m tall at the shoulder and weighed up to 30 – 35 t, though some specimens indicate a larger body size. Isolated vertebrae and limb bones suggest that it could have reached sizes comparable to Argentinosaurus and Puertasaurus, which would make it the absolute largest dinosaur known from North America.