Clypeus plotii Echinoid Fossil

While visiting the Gallery of Natural History at the Arizona Historical Society Museum at Papago Park (1300 N. College Ave, Tempe Arizona 85281) I saw fossil specimen (AHS-NH#9854) Clypeus plotii (Leske, 1778) sea urchin fossil. This creature existed in the Jurassic Period (Bajocian to Oxfordian). They were found in what is now Europe and North Africa.

Images of museum specimen taken October 2014.

Source to refer to:
http://www.nhm.ac.uk/research-curation/research/projects/echinoid-directory/taxa/taxon.jsp?id=557

Sphaeurilitides

Here is a picture of a Sphaeurilitides (Cusman) fossil at the Museo di Paleontologia at Sapienza University of Rome Italy. It was found in the Alps.

Image taken in June 2014.

Mytilus edulis Bivalve

This picture shows a Mytilus edulis (Gray, 1847) marine bivalve mollusc at the Museo di Paleontologia at Sapienza University of Rome Italy. Creatures like this exist in today's oceans. It is also known as the blue or common mussel.

Image taken in June 2014.

Info Sources:

http://en.wikipedia.org/wiki/Blue_mussel