Opisthias is a genus of sphenodont reptile. The type species, Opisthias rarus, is known from the Late Jurassic (Kimmeridgian-Tithonian) Morrison Formation of western North America,[2][3] present in stratigraphic zones 2 and 4–6.[4]
In 1862, an American explorer and his son are shipwrecked and washed upon a mysterious island. Soon they discover that this island is the home of generations of humans and dinosaurs living together in a peaceful and fantastic civilization called Dinotopia. Based on the books by James Gurney.
