<p>Littoraria angulifera (Lamarck, 1822) - mangrove periwinkle snail shell, modern (latest Holocene)
</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>Classification: Animalia, Mollusca, Gastropoda, Littorinidae
</p><p>Locality: Lighthouse Point beach, southern shore of the eastern tip of Sanibel Island, Gulf of Mexico coast of southern Florida, USA
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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/Littoraria_angulifera">https://en.wikipedia.org/wiki/Littoraria_angulifera</a>" rel="noreferrer nofollow"&gt;en.wikipedia.org/wiki/Littoraria_angulifera&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/49763452503/">Littoraria angulifera (mangrove periwinkle snail shell) (Sanibel Island, Florida, USA) 2</a>