"What is different about this group compared to other mollusks?", "segmented singled shelled" "What is the foot used for?", "locomotion" "Do they have a head?", "yes, reduced head" "Do they have radula?", "yes" "When were the living species discovered?", "1952" "Where are they found?", "deep ocean" "What habitat are they found in?", "continental shelves"
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