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This order of shelled, and slug-like opisthobranchs contains species that mostly live on marine algae and are usually criptically colored. Their name (sacoglossans) comes from the sac used to catch their discarded worn teeth.
One peculiar family in this order contains snails with bivalved shells. The species were placed with the Bivalvia until the living animal was finally found and discovered to be a gastropod.
2008/10/05 08:19:38.749 GMT-4


