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Tentaculites
© 2003 Thomas Kammer
Shelbyoceras robustum
© 2005 Nicholas Angeli
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What are Other Molluscs? There are a number of less familiar groups of molluscs that have a fossil record, such as:
Tusk shells (Scaphopoda) live buried in sediment inside their tusk-shaped, conical shells. They first appear in the Cambrian.
Chitons (Polyplacophora) have a “shell” made of seven to eight plates and can be seen in tide pools attached to rocks. They first appear in the Cambrian.
Limpet-like molluscs (Monoplacophora) have a single cap-shaped shell. They first appear in the Ordovician. First known fossil occurrence: Cambrian. Last known fossil occurrence: Quaternary. This group has living relatives. |
Fossils through time:
Choose a time period to see what life was like:
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