What direction does the river that Austrolebias bellotti are found in flow?
Austrolebias bellottii: Austrolebias bellottii is a species of fish that lives in the basins of the Paraná River and Uruguay River, in Argentina and Uruguay. Uruguay River:  It flows from north to south and forms parts of the boundaries of Brazil, Argentina, and Uruguay, separating some of the Argentine provinces of La Mesopotamia from the other two countries.
north to south