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Apex (mollusc)

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[Wikipedia] Aperture (mollusc)

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Oldest LIVING Fossils Around The World!

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Seashell Under The Microscope

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Introduction to Mollusca part 4

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Apex - Same Old Blues

In anatomy, an apex is part of the shell of a mollusk. The apex is the pointed tip of the shell of a gastropod, scaphopod, or cephalopod.