Abstract: The placement of the southern border of the Neotropical region, called Subtropical Line, is a long-lasting discussion. Its most debatable section runs around the Pampean province, where an isolated mountain system called Ventania shows Andean connections surrounded by Neotropical biota. To answer where to place the Subtropical Line, a thorough revision of the biogeography of Ventania is needed. Thus, we characterized Ventania as an area of endemism, conducted a similitude analysis to compare it with surrounding systems using stenoic taxa, compi...
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