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the familiar and economically important clams , oysters , scallops , and mussels . bivalvia ("two valves") refers to the fact that most members of this group have two-part calcareous shells, or valves, that are hinged and more or less symmetrical. pelecypoda ("hatchet-foot") refers to the common (but not
all are suspension feeders. many bivalves (clams, mussels, oysters, scallops, cockles) are important invertebrates for human consumption as well as key in food chains , being consumed by fish , birds , marine mammals , other vertebrates , and various invertebrates. in touching upon the human desire...
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