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Turtles are members of the Testudines family, and they have a shell developed from their ribs. There are two main groups of modern turtles: Cryptodira and Pleurodira. These groups differ in their shells and how their head retracts.

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Produktbeschreibung
Turtles are members of the Testudines family, and they have a shell developed from their ribs. There are two main groups of modern turtles: Cryptodira and Pleurodira. These groups differ in their shells and how their head retracts.