from the GNU version of the Collaborative International Dictionary of English

  • That class of Mollusca which includes the bivalve shells; the Lamellibranchiata. See mollusca.

from The Century Dictionary and Cyclopedia

  • In Lamarck's system of classification, headless mollusks with bivalve shells: a loose synonym of Lamellibranchiata, but including the brachiopods, which are now placed in a different class.
  • Disencumbered of the brachiopods, the Conchifera correspond to the Acephala testacea of Cuvier, or to the Lamellibranchiata of De Blainville and modern naturalists. Also called Conchophora, Acephala, Endocephala, Lipoccphala, and Pelecypoda.
  • In Gegenbaur's system of classification, one of two primary divisions of the Mollusca; the Mollusca of authors in general, exclusive of the Placophora or chitons.


Sorry, no etymologies found.



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