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Pyramidellacea
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Pyramidellacea

order of gastropod

Learn about this topic in these articles:

annotated classification

  • snail
    In gastropod: Classification

    Order Pyramidellacea Spiral shell; operculum present; gill and radula absent; long proboscis with stylet; ectoparasitic; in warm oceanic areas; generally minute. Order Acochlidacea Three families with visceral mass longer than foot; 4 species in fresh water; a few with sexes in separate animals; size minute. Order…

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