A new jaw of Mosasaurus hoffmanni Mantell 1829 from Chambers Creek in Navarro County, Texas

The Gulf coastal plain of Texas preserves a nearly uninterrupted Cretaceous marine record from Aptian to Maastrichtian (Stephenson 1914, 1941). Deposits are often rich in vertebrate remains, particularly actinopterygian fish, selachians, and mosasaurid reptiles (Case and Cappetta 1997; Thurmond 1969). Herein, we describe a jaw section from a large mosasaurid collected from Chambers Creek in Navarro County, Texas, USA.