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Anaspidea

gastropod order

Learn about this topic in these articles:

annotated classification

  • snail
    In gastropod: Classification

    Order Anaspidea Shell reduced to flat plate; feed on large seaweed rather than microscopic algae; sea hares (Aplysiidae); 1 other small family. Order Notaspidea Shell and gill usually present; no parapodia (extensions of foot); sperm groove open; shell prominent, reduced, or hidden by mantle; 2 families.…

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