Discoscaphites is an extinct genus of ammonite. Cretaceous of Greenland, Alabama, Arkansas, California, Colorado, Kansas, Maryland, Mississippi, Missouri, New Jersey, South Dakota, Tennessee, Texas, Wyoming ... Found on http://en.wikipedia.org/wiki/Discoscaphites
1) Cretaceous ammonite 
Discoscaphites is an extinct genus of ammonite. Cretaceous of Greenland, Alabama, Arkansas, California, Colorado, Kansas, Maryland, Mississippi, Missouri, New Jersey, South Dakota, Tennessee, Texas, Wyoming ...