Epiaster crassissimus
Echinoid
Late Cretaceous (Upper Turonian)
Rouen Chalk, Dixoni biozone
Dieppe (76), France

44mm on 44mm chalk slab.

Epiaster is an extinct sea urchin genus that lived from the Early to Late Cretaceous of North America, Europe, and North Africa.

Affordable example for the novice fossil collector.