The mastodon Gomphotherium angustidens is one of the fossil vertebrates more appreciated of the Museum, as it is one of the most complete specimens of Europe. This specimen which lived about 14 million years ago is a sub adult individual, according to the type of teething and to the epiphysis of the long bones, which were not consolidated. It was found in a clay quarry in Yuncos (Toledo) in 1970.