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Aplacophora
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Aplacophora

mollusk class

Learn about this topic in these articles:

annotated classification

  • organizational levels and body diagrams of mollusks
    In mollusk: Annotated classification

    Class Aplacophora Worm-shaped and without shells; marine, mostly in deep water. Possibly representive of the primitive molluscan condition or a secondary reduction from more advanced, shelled ancestors. About 300 species. Subclass Chaetodermomorpha (Caudofoveata) Worm-shaped; covered by cuticle and aragonitic scales; ventral gliding area reduced; mantle cavity

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