With the building in 1993 of the Yacyretá Dam, almost all the suitable habitat for Aylacostoma was flooded.
The dam at Yacyretá altered an area in which several hundred individuals lived and the draining of marshes for farmland and cattle threaten hundreds of hectares every year in Argentina and Brazil.
The bridge was first projected in 1977 through an agreement between the governments of Argentina and Paraguay, as a compensation to Paraguay for the flooding of part of its territory by the Yacyretá Dam.
Both extremes are settled in the Argentine coast, in the locality of Rincón Santa María and in the Paraguayan coast, near the city of San Cosme y Damián.
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