1) Cretaceous ammonite 
Mammites is an Upper Cretaceous ammonite belonging to the acanthoceratacean family, Acanthoceratidae, and is the type genus for the subfamily Mammitinae. It was named by Laube and Bruder in 1887. It range is Lower to Upper Turonian. Mammites is typically stout, usually with a rectangular or squarish whorl section and flattish to slightly concave v...