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This page was
created partly as a visual aid for identification of shell characteristics
and partly as a tribute to the myriad shapes, patterns and colors of the
shells of this fascinating group of animals.
Eventually the table of images below will show a comprehensive array of
examples for each shell characteristic shown in the figures on the Morphology
page, as well as many others (such as colors, patterns, and surface
ornamentation), but for now I've just shown a few to show the general idea
of the page.
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Spiral Whorl Types |
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| Planispiral |
Conical |
Evolute |
Involute |
Convolute |
Devolute |
Outer Lip Formations |
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| Spines |
Varices |
Wing-like varices |
Short digitations |
Simple digitations |
Branching digitations
(fronds) |
Textural Features |
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(no image) |
| Nodules |
Grooves |
Beads |
Pustules |
Scales |
Granules |
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(no image) |
(no image) |
(no image) |
Spiral cords
or ribs |
Axial Ribs |
Concentric ridges |
Radial ridges |
Cancellate |
Reticulate |
Color Patterns |
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| Ocelli |
Tents |
Axial stripes |
Spiral stripes |
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