The rostellum is normally present, rarely absent, and is armed with two alternating rows of hooks of characteristic taenioid shape. |
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The rostellum ends in a holdfast by which the cell is fixed to the gut wall of its host. |
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The third stigma is sterile and has developed into the rostellum, a sticky structure that aids in pollination by attaching the pollen to insects. |
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The scolex exhibits a retractable rostellum with crowns of recurved thorn-like hooks and four cup-like suckers. |
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