Jiaodontus is an extinct genus of lonchidiid cartilaginous fish which existed in Liuhuanggou, Xinjiang Uyghur Autonomous Region, northwestern China, during the late Jurassic (Oxfordian age).[1] Fossils have been found in the Qigu Formation, China.[1] It was first named by Stefanie Klug, Thomas Tütken, Oliver Wings, Hans-Ulrich Pfretzschner and Thomas Martin in 2010 and the type species is Jiaodontus montaltissimus.[1]