heteromyaria definition

  • noun-plural:
    • A division of bivalve shells, like the marine mussels, in which the two adductor muscles are particularly unequal. See dreissena, and Illust. under byssus.
  • others:
    • a small grouping of acephalous conchiferous mollusks, including the Mytilid√¶, or mussels and related types: distinguished from Dimyaria and Monomyaria.

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