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Protoconch

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What does protoconch mean?

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How to Pronounce protoconch - American English

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How to say "protoconch"! (High Quality Voices)

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How to Pronounce Protoconch

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How to pronounce Protoconch

A protoconch is an embryonic or larval shell which occurs in some classes of molluscs, e.g., the initial chamber of an ammonite or the larval shell of a gastropod. In older texts it is also called "nucleus". The protoconch may sometimes consist of several whorls, but when this is the case, the whorls show no growth lines.
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