Mosasaurs are an extinct group of large marine dinosaurs that may have evolved from a group of well-known aquatic lizards, the Aigialosaurs, of the early Cretaceous period. Mosasaurs lived from 100 million to 20 million years ago during the Cretaceous period.
After the extinction of the ichthyosaurs and the decline of the Plesiosaurs, Mosasaurs became one of the most widespread marine predators of the ancient seas. Mosasaurs were powerful, air-breathing swimmers who inhabited the warm, shallow, inland seas during the late Cretaceous period.
They give birth to live young rather than return to shore to lay eggs. Large mosasaurs were usually more than 25 feet long.The world's largest Mosasaur skeleton is currently on display, measuring over 43 feet long. Mosasaurs ate mollusks with shells similar to those of the ammonites that were abundant in the Cretaceous seas, as well as fish, turtles, and even sharks. This item is in the category "Collectibles\Rocks, Fossils & Minerals\Fossils\Vertebrates\Amphibian, Reptile & Dinosaur". The seller is "fossilbyucef" and is located in this country: MA. This item can be shipped worldwide.