The word cephalopod sounds complicated but you probably know what one is.
Cephalopods that you might recognise today include the octopus, cuttlefish and squid. They live in the sea, and are thought to be the most advanced of all the invertebrates.
Cephalopods are also important fossils, and the three groups we deal with here are the ammonites, the nautiloids and the belemnites.
The molluscs are split into different groups - the gastropods, bivalves and cephalopods. The cephalopods are also split into three groups.
If you read these pages you should become an expert invertebrate identifier!
The major groups are listed below - select a link to learn more about this type of fossil.
Echinoderms Return to the wheel
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