Gigantic mammal 'cousin' discovered. During the Triassic period (252-201 million years ago) mammal-like reptiles called therapsids co-existed with ancestors to dinosaurs, crocodiles, mammals, pterosaurs, turtles, frogs, and lizards. One group of therapsids are the dicynodonts. Researchers have discovered fossils from a new genus of gigantic dicynodont. The new species is called Lisowicia bojani. Source 4h.