Tylosaurus (from the ancient Greek τυλος (tylos) "protuberance, knob" + Greek σαυρος (sauros) "lizard") was a mosasaur, a large, predatory marine reptile closely related to modern monitor lizards and to snakes, from the Late Cretaceous.
Set in the far distant future where humankind live in colonies, nature has reclaimed the lands, great cities have crumbled to ruins, and dinosaurs rule the earth.
