cephalopod
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- Frontiers - Cephalopods as Predators: A Short Journey among Behavioral Flexibilities, Adaptions, and Feeding Habits
- Monterey Bay Aquarium - Cephalopod
- University of California Museum of Paleontology - The Cephalopoda
- Smithsonian Ocean - Cephalopods
- Nature - Cephalopod Camouflage: Cells and Organs of the Skin
- Animal Diversity Web - Cephalopoda
- Key People:
- Otto Heinrich Schindewolf Alpheus Hyatt
- Related Topics:
- ammonoid nautilus Gastrioceras Tropites Tornoceras
cephalopod, any member of the class Cephalopoda of the phylum Mollusca, a small group of highly advanced and organized, exclusively marine animals. The octopus, squid, cuttlefish, and chambered nautilus are familiar representatives. The extinct forms outnumber the living, the class having attained great diversity in late Paleozoic and Mesozoic times. The extinct cephalopods are the ammonites, belemnites, and nautiloids, except for five living species of Nautilus. The cephalopods agree with the rest of the Mollusca in basic structure, and the ancestors appear to have the closest affinity with the ancestors of the class Gastropoda. The best-known feature of the cephalopods ...(100 of 4873 words)