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The carnivorous snails have tongues that are covered with thousands of tiny teeth to tear apart food. The gastropod fossils from Jacksboro, TX shown below are from the Pennsylvanian, Finis formation, and these gastropods lived about 300 million years ago.
The life cycle of a gastropod can vary depending on where it lives and the weather conditions of its environment. Gastropods such as the brown garden snail (land gastropod) and the conch snail (marine gastropod) are examined for additional information on their life cycles.