2025-09-042025-09-042023-12-13OLIVEIRA, Juliana Ribeiro de. Inferências moleculares sugerem diversidade críptica de Sylvilagus brasiliensis (Logomorpha: Leporidae) nas Américas Central e Sul. Orientador: Adam Rick Bessa da Silva. 2023. 19 f. Trabalho de Conclusão de Curso (Licenciatura em Ciências Biológicas) – Faculdade de Ciências Biológicas. Instituto de Estudos Costeiros, Campus Universitário de Bragança, Universidade Federal do Pará, Bragança-PA, 2023. Disponível em: https://bdm.ufpa.br/handle/prefix/8532. Acesso em: .https://bdm.ufpa.br/handle/prefix/8532Sylvilagus brasiliensis, known as Tapiti, stands out for its wide geographical distribution in the Americas. This animal is found in various biomes of Brazil, generating taxonomic debates about the possible existence of cryptic species and the impact of environmental factors on its differentiation. Our analyses focused on the 12S rRNA gene and identified two distinct clades within S. brasiliensis: Central America Clade and South America Clade, without gene flow between them. The haplotype network and the significant genetic divergence (1.6% for Da and 2% for p-distance) found corroborate the existence of two distinct haplogroups along the species' distribution. The genetic discontinuity shows an apparent relation with the Andes as a barrier, acting as a vicariant event for this species. The function of the Andes as a geographical barrier in species diversification is particularly important, as the ancestral populations of S. brasiliensis likely originated in Central America, subsequently dispersing to the south and being separated by the Andes. The results show a strong taxonomic impact for this species, although more research, especially with more comprehensive sampling, is necessary to understand the diversification and conservation of S. brasiliensis, a species at risk of extinction.Acesso AbertoSylvilagus brasiliensisEspécies crípticasDistribuição geográficaNeotropicosmtDNACryptic speciesGeographical distributionNeotropicsCNPQ::CIENCIAS BIOLOGICAS::GENETICA::GENETICA ANIMALTrabalho de Curso - Graduação - ArtigoAttribution-NonCommercial-NoDerivs 3.0 Brazil