<p>Pomacea sp. - apple snail shell (modern) from Florida, USA. (apical view)
</p><p>The gastropods (snails &amp; slugs) are a group of molluscs that occupy marine, freshwater, and terrestrial environments.  Most gastropods have a calcareous external shell (the snails).  Some lack a shell completely, or have reduced internal shells (the slugs &amp; sea slugs &amp; pteropods).  Most members of the Gastropoda are marine.  Most marine snails are herbivores (algae grazers) or predators/carnivores.
</p><p>The apple snails are a group of freshwater gastropods.  This apple snail shell is from Florida, where one native species and several invasive / pest species are present.  This empty shell was collected in December 1988.
</p><p>Classification: Animalia, Mollusca, Gastropoda, Ampullariidae
</p><p>Locality: near Manatee Spring, near the eastern side of the Suwanee River, northwestern Levy County, near the Gulf Coast of Florida, USA (vicinity of 29˚ 29' 22" North latitude, 82˚ 58' 37" West longitude)
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<hr><p>See info. at:
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&lt;a href="<a class="external free" href="https://en.wikipedia.org/wiki/Pomacea">https://en.wikipedia.org/wiki/Pomacea</a>" rel="noreferrer nofollow"&gt;en.wikipedia.org/wiki/Pomacea&lt;/a&gt;
<a rel="nofollow" class="external text" href="https://www.flickr.com/people/47445767@N05">James St. John</a>
CC BY 2.0
<a rel="nofollow" class="external text" href="https://www.flickr.com/photos/jsjgeology/49062630417/">Pomacea sp. (apple snail shell) (eastern banks of the Suwannee River, Levy County, Florida, USA) 3</a>