Belemnites were marine animals belonging to the phylum Mollusca and the class Cephalopoda. Their closest living relatives are squid and cuttlefish. They had a squid-like body but, unlike modern squid, they had a hard internal skeleton – which you can see in this fossil! Belemnites lived during the periods of Earth history known as the Jurassic and Cretaceous; together, these represent a time interval of about 135 million years. The Jurassic Period began about 201 million years ago and the Cretaceous Period ended about 66 million years ago. Fun fact: Belemnites are Delaware’s state fossil!
Tullia's Jewels 