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Heteromya
Heteromya, a subdivision of the bivalve mollusca (Lamellibranchiata) in which the shell is closed by two adductor muscles, of which the anterior is much the smaller.
Heteromya, a subdivision of the bivalve mollusca (Lamellibranchiata) in which the shell is closed by two adductor muscles, of which the anterior is much the smaller.