GLOSSARY OF GASTROPOD MORPHOLOGIC TERMS

Illustrations and objective data courtesy of AMOCO Production Co., Alan B. Shaw (Manager, South Florida Carbonate Project), and Brian F. Glenister (AMOCO Consultant)

A2. Aperture Shape

The shape of the opening of the shell
 
 
Character State Definition Illustration
none No aperture

oval Opening is elliptical
round Opening is circular
narrow and pointed at top Narrow opening that comes to a point
rhombohedral Opening shaped like a rhombohedron
 

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Last updated on August 28, 2002-eek.