Term
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Definition
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Term
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Definition
| dorsal visceral mass coiled above foot; head with sensory tentacles; coiled shell w/columella; operculum seals aperture of shell |
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Term
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Definition
| happens as veligers; 180 degree counter clockwise rotation of visceral mass; not coiling of visceral mass |
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Term
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Definition
| fresh water into mantle cavity w/movement; keep stirred up water out of cavity; easier to bring head into shell |
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Term
| Why Torsion? Disadvantages: |
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Definition
| anus near mouth, gills, and sensory(fouling of gills and osphiradia); unidirectional water flow: dorsal opening in shell, loss of ctenidium on right side; secondary detorsion 90 degrees: mantle cavity on right side |
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Term
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Definition
| Well developed foot; produces mucus(helps move w/o damaging foot);ciliary actionj, pedal waves |
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