Sphenodiscus Aragonite Ammonite Fossil

Picture of aragonite ammonite shell fossil of a Sphenodiscus sp. The creature existed the late Cretaceous Period Upper Maastrichtian stage. Fossil was found in Fox Hills Formation of South Dakota USA. Specimen was on display at the Muséum National D'Histoire Naturelle Minéralogie et Géologie in Paris France (August 2016).

Learn more here:
http://www.mnhn.fr/fr/visitez/lieux/galerie-mineralogie-geologie

Thecidea papillata Brachiopod Fossil

These images are of Thecidea papillata (von Schlotheim) brachiopod fossil. It existed in the upper Cretaceous Period (Upper Maastrichtian). Found in Lichenberg Horizon of Maastricht Netherlands.

Thanks to Clive for these brachiopods.

Placenticeras meeki Ammonite Fossil

Here is a picture of a Placenticeras meeki ammonite fossil at the Museo di Paleontologia at Sapienza University of Rome Italy. Creatures like this existed in the western interior seaway at the time of the upper/late Cretaceous Period (ICS geological timescale: Maastrichtian). Fossil was found in Cheyenne River of South Dakota USA.

Image taken in June 2014.