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An Illustrated and Cross-Referenced Glossary of Malacological and Conchological Terms |
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| by Paul S. Mikkelsen | |||
| Term | Definition |
| BEAK (1) |
In bivalves, the earliest part formed, = UMBO; any part which is drawn out like a beak or ROSTRATED. See illustration: Composite Bivalve.
See: Bivalve terminology, Anatomy of bivalves by Marlo Krisberg. |
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| BEAK (2) |
In cephalopods, the CHITINOUS plates of the mouth, which resemble the beak of a parrot.
See the excellent "Cephalopod Glossary" by Richard E. Young, Michael Vecchione, and Katharina M. Mangold. |
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| Copyright ©Paul S. Mikkelsen, All Rights Reserved | Return to Home Page | Return to Top | Over 1700 Terms in the Glossary! |