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Note: Do not rely on this information. It is very old.
Asiphonida
Asiphonida, those bivalved mollusca (Lamellibranchiata) without, or with only imperfectly developed, respiratory siphons.
Asiphonida, those bivalved mollusca (Lamellibranchiata) without, or with only imperfectly developed, respiratory siphons.