Ammonites

An extinct group of Cephalopoda, with solid external skeletons. They are excellent index fossils.

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Lesser horseshoe bat

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The American bison is the largest land animal in North America.

Blue whale

Marine mammals, the largest known animals to have ever existed.

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The ancestors of Arachnida and Crustacea belonged to the class Trilobita.

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Red deer are even-toed ungulates, ruminants. Their males have spectacular antlers.

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The poisonous bite of the Chilean recluse spider poses a serious threat to human health.

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