Venn diagram of species richness among the three ecoregions. BeccaceceHernán Mario ZeballosSebastián Rodolfo ZapataAdriana Inés 2016 <p>Each circle represents an ecoregion, Y: Yungas, P: Paraná and Ch: Chaco Serrano. Numbers indicate the species found exclusively in each habitat, in two ecoregions or in all of them.</p>