| Aperture (mollusc) |
Article Index for Aperture |
Information AboutAperture (mollusc) |
|
Aperture is the opening in the Shell Of A Gastropod , through which the snail emerges. This opening can be closed, in most cases, by an Operculum . The aperture is generally elliptical or oval, but its upper part (the parietal wall) can have a truncated appearance. However, the aperture can also have many other forms: round, semicircular, trilobate or auriculate. This shape corresponds roughly to the cross-section of the last Body Whorl . An aperture has three walls:
The aperture is surrounded, except at the top, by the aperture margin. |
|
|