Publicação

Integrative taxonomy clarifies the evolution of a cryptic primate clade

Detalhes bibliográficos
Resumo:	Global biodiversity is under accelerating threats, and species are succumbing to extinction before being described. Madagascar’s biota represents an extreme example of this scenario, with the added complication that much of its endemic biodiversity is cryptic. Here we illustrate best practices for clarifying cryptic diversification processes by presenting an integrative framework that leverages multiple lines of evidence and taxon-informed cut-offs for species delimitation, while placing special emphasis on identifying patterns of isolation by distance. We systematically apply this framework to an entire taxonomically controversial primate clade, the mouse lemurs (genus Microcebus, family Cheirogaleidae). We demonstrate that species diversity has been overestimated primarily due to the interpretation of geographic variation as speciation, potentially biasing inference of the underlying processes of evolutionary diversification. Following a revised classification, we find that crypsis within the genus is best explained by a model of morphological stasis imposed by stabilizing selection and a neutral process of niche diversification. Finally, by clarifying species limits and defining evolutionarily significant units, we provide new conservation priorities, bridging fundamental and applied objectives in a generalizable framework.
Autores principais:	Elst, Tobias van
Outros Autores:	Sgarlata, Gabriele M.; Schüßler, Dominik; Tiley, George P.; Poelstra, Jelmer W.; Scheumann, Marina; Blanco, Marina B.; Aleixo-Pais, Isa; Evasoa, Mamy Rina; Ganzhorn, Jörg U.; Goodman, Steven M.; Hasiniaina, Alida F.; Hending, Daniel; Hohenlohe, Paul A.; Ibouroi, Mohamed T.; Iribar, Amaia; Jan, Fabien; Kappeler, Peter M.; Pors, Barbara Le; Manzi, Sophie; Olivieri, Gillian; Rakotonanahary, Ando N.; Rakotondranary, S. Jacques; Rakotondravony, Romule; Ralison, José M.; Ranaivoarisoa, J. Freddy; Randrianambinina, Blanchard; Rasoloarison, Rodin M.; Rasoloharijaona, Solofonirina; Rasolondraibe, Emmanuel; Teixeira, Helena; Zaonarivelo, John R.; Louis, Edward E.; Yoder, Anne D.; Chikhi, Lounès; Radespiel, Ute; Salmona, Jordi
Assunto:	Biodiversity Extinction Madagascar Species diversity Speciation Conservation
Ano:	2024
País:	Portugal
Tipo de documento:	artigo
Tipo de acesso:	acesso aberto
Instituição associada:	Instituto Politécnico de Bragança
Idioma:	inglês
Origem:	Biblioteca Digital do IPB

Descrição
Resumo:	Global biodiversity is under accelerating threats, and species are succumbing to extinction before being described. Madagascar’s biota represents an extreme example of this scenario, with the added complication that much of its endemic biodiversity is cryptic. Here we illustrate best practices for clarifying cryptic diversification processes by presenting an integrative framework that leverages multiple lines of evidence and taxon-informed cut-offs for species delimitation, while placing special emphasis on identifying patterns of isolation by distance. We systematically apply this framework to an entire taxonomically controversial primate clade, the mouse lemurs (genus Microcebus, family Cheirogaleidae). We demonstrate that species diversity has been overestimated primarily due to the interpretation of geographic variation as speciation, potentially biasing inference of the underlying processes of evolutionary diversification. Following a revised classification, we find that crypsis within the genus is best explained by a model of morphological stasis imposed by stabilizing selection and a neutral process of niche diversification. Finally, by clarifying species limits and defining evolutionarily significant units, we provide new conservation priorities, bridging fundamental and applied objectives in a generalizable framework.