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cephalopoda


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Literally ‘head- foot’, a class of Mollusca, exclusively marine, related to the Bivalvia and Gastropoda. The class includes the Nautiloidea (nautiloids), Sepioidea (cuttlefish), Teuthoidea (squids), Octopoida (octopuses), and the extinct Ammonoidea (goniatites, ceratites, ammonites) and Belemnitida (belemnites). The earliest forms belonged to the Nautiloidea and date from the Upper Cambrian.

Subjects: Earth Sciences and Geography — Zoology and Animal Sciences.


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