The most stable area using I s or raw W (the second best index), was the Malvinas islands, a candidate to be the best area (Fig. 3 ). The high uncertainty in the area chosen is eliminated when the support is included in the selection of the best area. Santiago has the highest number of species and harbors the highest number of endemic species, but it was not placed as the highest priority, while Malvinas island, the second most endemic area has the highest priority. The inferences based on the Table 1 First area in the ranking proposed by Posadas et al. ( 2001 ). un-sampled **data** set might be misleading, while jack-knifi ng could help to decide which is the most supported solution.