“…The latter could be evidence of habitat specialization and, as a consequence, incipient genetic isolation that would explain a certain structure of the population (Soltis and Soltis, 1990;Pelosi and Sessa, 2021). In northern South America, numerous endemisms have been described growing in white-sand soils (Fine et al, 2010;Fine and Baraloto, 2016;Grande et al, 2023), which can be associated with different plant formations such as grassland, shrubland, savannas, and sometimes forest (Huang and Hartemink, 2020). Likewise, in this region, the type of soil has proved an important factor in the genetic differentiation of tree populations such as Burseraceae, where they act as distinct genetic pools, with few shared haplotypes (Fine et al, 2013).…”