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Order Summary for Echiuroidea
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Main Ref.
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Order
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Echiuroidea
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Class
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Polychaeta
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Sister Order
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M years
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Ref.
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First Fossil Record
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Occurs in
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Marine
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Fresh
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Brackish
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Remark
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AphiaID=110342
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Class etymology
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Order etymology
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Families
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