In which geographic area is the Aspredinidae family, which includes the Banjo Catfish, almost entirely confined?

Answer

Freshwater systems east of the Andes Mountains in South America

The Aspredinidae family is almost entirely confined to freshwater systems within South America, generally situated east of the Andes Mountains.

In which geographic area is the Aspredinidae family, which includes the Banjo Catfish, almost entirely confined?
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