An EXTRA LARGE, ultrarare Top Quality Hexanchus griseus tooth - a Sixgill Cow shark, from the Randle's Cliff, Maryland. A June Fossil of the Month.A rare lower jaw symphyseal tooth with 11 primary cusps - male species. This tooth has an excellent brown color with a brown root. Great color and preservation. This is a Miocene age, Calvert Formation tooth. An excellent ultra rare collector's tooth. Authenticity guaranteed.
This catalog contains excellent shark teeth from one of the rarest and highly sought after Cow sharks, Hexanchus griseus, a Sixgill Cow shark. Hexanchus teeth exhibit wide rectangular root that is topped with a saw-like row of six or more cusps. The Cow shark family is fairly rare and exceptional specimens are hard to locate. These teeth are Miocene age found in Maryland and are among the finest known examples.