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| Geological photographs from around the world | ||||||||
Cephalopods
Cephalopods are free-swimming, marine animals with tentacles for catching prey.
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Modern cephalopods include:
Most cephalopods have a shell which is divided into chambers for buoyancy. |
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Nautiloids occur throughout the Phanerozoic - Nautilus just about survives today.
Ammonoids evolved from the nautiloids during the Devonian, were prolific during the Mesozoic but finally became
extinct at the end of the Cretaceous, at the same time as the dinosaurs - part of the mass extinction at the K-T
boundary.
- gives an illustrated description of the cephalopods;
- describes the main morphological features;
- relates the modern Nautilus to the extinxt ammonoids;
- outlines the evolution of the cephalopods;
- describes how the ammonoids can be used for correlation;
- includes a brief account of the gastropods and belemnites.
The Study Guide contains the following pages:
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To order this CD go to the Geopix Online Store