Name: Hippurites radiosus Desmoulins, 1826.
Order Hippuritoida
Age: Cretaceous, Turonian
Origin: Angoulême, Charente, France
Height: 15 cm
Diameter at the top: 9.8cm
Hippurites are bivalve molluscs with asymmetric valves, they lived attached to the sediment by their lower valves which is conical, the top bears an opercular valve.