Gastropod shell

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Shell of Zonitoides nitidus has dextral coiling.
Upper image: dosrsal view, whorl (apex) position,
central image: ventral view,
down image: base or umbilicus position

Gastropod shell is animal shell of gastropods. It is produced by mantle.

Most gastropods have a shell, which is in one piece and typically spirally coiled due of torsion.

Parts of gastropod shell may include:

• periostracum

• protoconch
• apex

• spire
• whorl
• body whorl

• columella
• umbilicus

• lira
• plait
• varix

• operculum

Various types of shells:

planispiral shell - Marisa cornuarietis

shell - Helix pomatia

shell - Cypraea nebrites

shell - Turbo chinensis

shell - Turitellidae

shell

[edit] See also

• conchology

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