CROSSING BORDERS: COMPARATIVE PHYLOGEOGRAPHY OF SOUTH AMERICAN LIVEBEARERS
"2025-02-12 10:36:07" // app/Providers/../Base/Publico/Artigo/resources/show_includes/info_artigo.blade.php
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Our study aims to investigate the biogeographic role of the watershed divide that separates the coastal basins and the inland La Plata basin, focusing on the livebearers of the genus Phalloceros (Poeciliidae) as a model group. Through the integration of morphological and whole genome sequencing data, we delineated over 20 species within the genus. Notably, four species Phalloceros reisi, P. spiloura, P. titthos, and an undescribed species—are found on both sides of the divide. For our phylogeographic analysis, we sampled 192 individuals across 46 populations, with 19 originating from headwaters of the La Plata basin and 27 from headwaters of coastal basins, utilizing a variety of markers ranging from mitochondrial data (COI) to ddRADseq. Preliminary results reveal that Phalloceros populations from the La Plata are not monophyletic, and the distribution of highland species suggests a minimum of four independent dispersal events across the Serra do Mar biogeographic barrier." 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These features give rise to numerous hydrographic basins isolated by mountainous terrains, flowing directly into the ocean. Our study aims to investigate the biogeographic role of the watershed divide that separates the coastal basins and the inland La Plata basin, focusing on the livebearers of the genus Phalloceros (Poeciliidae) as a model group. Through the integration of morphological and whole genome sequencing data, we delineated over 20 species within the genus. Notably, four species Phalloceros reisi, P. spiloura, P. titthos, and an undescribed species—are found on both sides of the divide. For our phylogeographic analysis, we sampled 192 individuals across 46 populations, with 19 originating from headwaters of the La Plata basin and 27 from headwaters of coastal basins, utilizing a variety of markers ranging from mitochondrial data (COI) to ddRADseq. Preliminary results reveal that Phalloceros populations from the La Plata are not monophyletic, and the distribution of highland species suggests a minimum of four independent dispersal events across the Serra do Mar biogeographic barrier." 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