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Columella (gastropod)
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The columella or pillar is a central anatomical feature of a coiled snail shell, a gastropod shell. The columella is often only clearly visible as a structure when the shell is broken, sliced in half
An X-ray image of a shell of a marine Triton snail (Charonia), showing the slightly sinuous line of the central columella, reaching from the top of the image (the apex of the shell) to the bottom (the siphonal canal)
An X-ray image of a shell of a marine Triton snail (Charonia), showing the slightly sinuous line of the central columella, reaching from the top of th
Two views of a shell of Scaphella lamberti, and in the center, a cut-down shell showing the folds on the columella
Two views of a shell of Scaphella lamberti, and in the center, a cut-down shell showing the folds on the columella
Cross section showing the columella of Amastra hutchinsonii (Pease, 1862)
Cross section showing the columella of Amastra hutchinsonii (Pease, 1862)
Monilea smithi
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Monilea smithi is a species of sea snail, a marine gastropod mollusk in the family Trochidae, the top snails.
Monilea smithi