Allosaurus fishes, frogs, salamanders, turtles, sphenodonts, lizards, terrestrial and aquatic crocodylomorphans, several species of pterosaur, numerous dinosaur species, and early mammals such as docodonts, multituberculates, symmetrodonts, and triconodonts. Dinosaurs known from the Morrison include the theropods "Ceratosaurus", "Ornitholestes", "Tanycolagreus", and "Torvosaurus", the sauropods "Haplocanthosaurus", "Camarasaurus", "Cathetosaurus", "Brachiosaurus", "Suuwassea", "Apatosaurus", "Brontosaurus", "Barosaurus", "Diplodocus", "Supersaurus", and "Amphicoelias", and the ornithischians "Camptosaurus", "Dryosaurus", and "Stegosaurus". "Allosaurus" is commonly found at the same sites as "Apatosaurus", "Camarasaurus", "Diplodocus", and "Stegosaurus". The Late Jurassic formations of Portugal where "Allosaurus" is present are interpreted as having been similar to the Morrison but with a stronger marine influence.
The Known Lands the various sentient races have built nations and civilizations. It is a time of peace and prosperity. But though peace reigns over much of The Known Lands, it is not a time of tranquility. In the past fifty years, The Known Lands have been shocked with the realization that below their islands exists a subterranean world at least as large as their own – the Underdark. A formerly unknown race, the drow, has twice come into the Known Lands from this underworld. Two massive attacks by the drow have all but destroyed the citadel homelands of the dwarves, leaving that