A lunule (from the Latin meaning small moon or crescent moon) is an anatomical feature which is found in the exterior surface of the shells of some species of clams, bivalve mollusks, as for example in the family Veneridae and in the genus Ascetoaxinus. The lunule is a well-defined area near the hinge line of the shell, anterior to the beaks. Despite the name, a lunule is not always in the shape of a crescent moon. Details of the lunule are sometimes an important diagnostic feature in identifying a bivalve shell.
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| - Lunule (bivalve) (fr)
- Lunule (bivalve) (en)
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| - La lunule est une surface développée de chez certains Bivalves le long de leur bord dorsal en avant des crochets de leurs valves. Comme l'écusson (ou corselet, dépression dorsale située en arrière des crochets et dans laquelle le ligament se prolonge), cette zone déprimée se distingue du reste de la coquille par son ornementation, ce qui est un élément de diagnose. La ligne de jointure des valves qui se développe depuis le crochet est appelée la commissure. Elle passe par la lunule et l'écusson. (fr)
- A lunule (from the Latin meaning small moon or crescent moon) is an anatomical feature which is found in the exterior surface of the shells of some species of clams, bivalve mollusks, as for example in the family Veneridae and in the genus Ascetoaxinus. The lunule is a well-defined area near the hinge line of the shell, anterior to the beaks. Despite the name, a lunule is not always in the shape of a crescent moon. Details of the lunule are sometimes an important diagnostic feature in identifying a bivalve shell. (en)
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| - La lunule est une surface développée de chez certains Bivalves le long de leur bord dorsal en avant des crochets de leurs valves. Comme l'écusson (ou corselet, dépression dorsale située en arrière des crochets et dans laquelle le ligament se prolonge), cette zone déprimée se distingue du reste de la coquille par son ornementation, ce qui est un élément de diagnose. La ligne de jointure des valves qui se développe depuis le crochet est appelée la commissure. Elle passe par la lunule et l'écusson. (fr)
- A lunule (from the Latin meaning small moon or crescent moon) is an anatomical feature which is found in the exterior surface of the shells of some species of clams, bivalve mollusks, as for example in the family Veneridae and in the genus Ascetoaxinus. The lunule is a well-defined area near the hinge line of the shell, anterior to the beaks. Despite the name, a lunule is not always in the shape of a crescent moon. Details of the lunule are sometimes an important diagnostic feature in identifying a bivalve shell. (en)
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