Falcatus falcatus desmatosuchus Isisaurus compartía las características típicas

Isisaurus compartía las características típicas de los titanosaurios

The American mastodon was similar in appearance to modern elephants

muscular neck supporting the elongated head

5 to 4 tons

Falcatus falcatus desmatosuchus Isisaurus compartía las características típicasFalcatus falcatus was a small but extraordinary cartilaginous fish that lived during the Early Carboniferous , approximately 325 million years ago , in what is now North America. It is an extinct species of shark belonging to the group of holocephalans, close relatives of current chimaera, although with unique anatomical characteristics that make it one of the most peculiar fish of its time. Its name, Falcatus , derives from Latin and means "curved