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see clamclam,
common name for certain bivalve mollusks, especially for marine species that live buried in mud or sand and have valves (the two pieces of the shell) of equal size.
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References in periodicals archive ?
Quahog Parasite X ("QPX") of hard-shell clams, Mercenaria mercenaria and M.
The age structure of a population of the hard-shell clam, Mercenaria mercenaria from Southampton Water, England, derived from acetate peel replicas of shell sections.