(unnamed)

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(unnamed) flows into Río Paraná , which it joins at S 25° 2′ 21″, W 54° 27′ 26″ at OSM node n536031840, and there 81,033 km of total upstream flows in. load it's distributaries

(unnamed) has 1 tributaries.

• Rio São Joao, which joins it at S 25° 7′ 35″, W 54° 18′ 33″ at OSM node n2690920070, and 5 km of total upstream flows in.
load it's tributaries