Historical biogeography and population genetic structure of the giant gilded catfish (Brachyplatystoma rousseauxii): expanding Humboldtian connectivity routes between the Orinoco and Amazon River basins
José Gregório Martínez, Diana Sánchez-Bernal, Sandra Marcela Hernández-Rangel, Jacqueline Batista, Susana Josefina Caballero, Izeni Pires Farias, Tomas Hrbek
This study investigates the genetic structure and historical connectivity of Brachyplatystoma rousseauxii between the Orinoco and Amazon basins, finding genetic divergence and identifying the Rupununi Portal as a key historical connection point.
bioRxiv · Aug 9, 2026 · PreprintEvolutionary Biology