Hoploscaphites nicolleti Ammonite

The Hoploscaphites nicoletti ammonite fossil from the Late Cretaceous (68-65 million years ago). Found in South Dakota. On display at the Smithsonian National Museum of Natural History.

Parkinsonia dorsetensis Ammonite

The Parkinsonia dorsetensis ammonite fossil from the Middle Jurassic (174-164 million years ago). Found in England. On display at the Smithsonian National Museum of Natural History.

Pyritized Horn Coral - Amplexus fragilis

This is an interesting fossil in that it is pyritized and a horn coral. The identification appears to be Amplexus fragilis (White & St. John) of the Coral Ridge fauna, New Providence Shale of Jefferson County, Kentucky. Time period for this specimen is Middle Mississippian (Osagean).

Thanks to Alan for trading for this fossil.