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Cypraea annulus
Cypraea annulus
Linnaeus, 1758
Gold Ring Cowry
Lauren Hughes (2011)
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Size & Shape
The shell of
Cypraea annulus
ranges from 9 to 50mm in length but is generally around 15 - 20mm. This species shows female-biased sexual size dimorphism, i.e. females are larger than males.
Differences in shell size, shape and colouration of gold ring cowry adults.
(Photo by: Wikimedia Commons user:
Bin im Garten
)
Cowries do not look like typical gastropods. This coiling is a common feature to gastropods and cowry adults show coiling inside their shell and remnants of a spire. Juvenile cowries look more like conventional gastropods as they posses an obviously coiled shell with a gaping aperture.
Shape and inner coiling of
Cypraea annulus.
(Photo by: Wikimedia Commons user:
Bin im Garten
)
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