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- A prodissoconch (meaning first or earliest or original shell) is an embryonic or larval shell which is present in the larva of a bivalve mollusk (clams, scallops, oysters, etc.). (The homologous structure in gastropods (snails) is called the protoconch.) The prodissoconch is often but not always smooth, and has no growth lines. It is sometimes still present and visible in the adult shell, if there has been no erosion of the shell in that area. The structure of the prodissoconch has been widely used as a discriminating feature in bivalve systematics. (en)
- 胚殼（學名：Prodissoconch），又作前結殼，是雙殼綱軟體動物（即蛤蜊、蜆、扇貝、牡蠣等物種）在其胚胎階段或幼蟲階段時就已存在的早期外殼。在腹足綱軟體動物的為或（Protoconch）。 胚殼一般都是平滑的，但並不完全都是，但沒有生長線這點則是共同的。如果其胚殼沒有被侵蝕消失的話，一般在其成年貝殼中仍可見。 胚殼的結構已被廣泛用作雙殼類分類中的一種鑑別特徵。 (zh)
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- A prodissoconch (meaning first or earliest or original shell) is an embryonic or larval shell which is present in the larva of a bivalve mollusk (clams, scallops, oysters, etc.). (The homologous structure in gastropods (snails) is called the protoconch.) The prodissoconch is often but not always smooth, and has no growth lines. It is sometimes still present and visible in the adult shell, if there has been no erosion of the shell in that area. The structure of the prodissoconch has been widely used as a discriminating feature in bivalve systematics. (en)
- 胚殼（學名：Prodissoconch），又作前結殼，是雙殼綱軟體動物（即蛤蜊、蜆、扇貝、牡蠣等物種）在其胚胎階段或幼蟲階段時就已存在的早期外殼。在腹足綱軟體動物的為或（Protoconch）。 胚殼一般都是平滑的，但並不完全都是，但沒有生長線這點則是共同的。如果其胚殼沒有被侵蝕消失的話，一般在其成年貝殼中仍可見。 胚殼的結構已被廣泛用作雙殼類分類中的一種鑑別特徵。 (zh)
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- Prodissoconch (en)
- 胚殼 (zh)
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