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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.
Physical Characteristics. All cone snails are wide at one end and narrow at the base (the typical âconeâ shape). All have spires, (whorls above the body whorl) of varying heights at the wide end. A whorl is a full turn of the shell.Shell bodies (whorls) can be dull to very shiny, smooth to lined and bumpy.one snail venom is very complicated chemically, varying widely in its makeup from species to species, whether a piscovore, the most toxic, or a vermivore, the least toxic; and with each individual sting or attack. Cone snails are among the most toxic creatures on earth.