What river divides the country which was home to Anerastia?
Anerastia Anerastia is a genus of snout moths. It was described by Hübner, in 1825, and is known from Egypt, Sudan.
Paraná Delta The Paraná Delta (Spanish: "Delta del Paraná" ) is the delta of the Paraná River in Argentina and it consists of several islands known as the Islas del Paraná. The Paraná flows north–south and becomes an alluvial basin (a flood plain) between the Argentine provinces of Entre Ríos, Santa Fe and Buenos Aires then emptying into the Río de la Plata.