General Morphologic Features of a Gastropod
Illustrations and objective data courtesy of AMOCO Production Co., Alan B. Shaw (Manager, South Florida Carbonate Project), and Brian F. Glenister (AMOCO Consultant)
Also see: Chapter 15, Prothero text pages 272-307 (Gastropods, pages 279-286)
- apex= the tip of the spire of the shell
- body whorl= the last whorl of the shell
- siphon canal= narrow prolongation of the lip of the aperture
- inner lip= portion of aperture adjacent to the axis
- operculum= a plate or door that closes the aperture
- outer lip= the outer edge of the aperture (peristrome)
- spire= the upper whorls, from the apex to the body whorl
- suture= line on the spire where two whorls touch each other
- umbilicus= a small notch at the base of the shell
| See also page 282 in Prothero text |
 |
 |
 |
 |
Last updated on August 27, 2002-eek.