Information about Siphonal Canal

Enlarge picture
Penion cuvieranus cuvieranus, showing its siphonal canal to the left.
In gastropod molluscs a siphonal canal is a semitubular extension of the aperture through which the inhalant (anterior) siphon is extended.
Gastropoda
Cuvier, 1797

Subclasses

Eogastropoda (True Limpets and relatives)
Orthogastropoda

The gastropods, also previously known as gasteropods, or univalves
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Mollusca
Linnaeus, 1758

Classes

Caudofoveata
Aplacophora
Polyplacophora
Monoplacophora
Bivalvia
Scaphopoda
Gastropoda
Cephalopoda
† Rostroconchia
† Helcionelloida
† ?Bellerophontida
The molluscs
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aperture is the main (or only) opening in the shell of a gastropod or snail. It is where the soft parts of the animal emerge. In some prosobranch gastropods, the aperture is able to be closed, and even completely sealed, with a sort of door or operculum.
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