bioRxiv preprint doi: https://doi.org/10.1101/279620; this version posted March 15, 2018. The copyright holder for this preprint (which was not certified by peer review) is the author/funder, who has granted bioRxiv a license to display the preprint in perpetuity. It is made available under aCC-BY-NC-ND 4.0 International license. Thirty clues to the exceptional diversification of flowering plants Susana Magallón1, Luna L. Sánchez-Reyes2, Sandra L. Gómez-Acevedo1 5 1Departamento de Botánica, Instituto de Biología, Universidad Nacional Autónoma de México, 3er Circuito de Ciudad Universitaria, Del. Coyoacán, Ciudad de México 04510, México. 2Posgrado en Ciencias Biológicas, Instituto de Biología, Universidad Nacional Autónoma de 10 México, 3er Circuito de Ciudad Universitaria, Del. Coyoacán, Ciudad de México 04510, México. Author for correspondence: Susana Magallón Tel: +52 55 5622 9087 15 Email:
[email protected] 1 bioRxiv preprint doi: https://doi.org/10.1101/279620; this version posted March 15, 2018. The copyright holder for this preprint (which was not certified by peer review) is the author/funder, who has granted bioRxiv a license to display the preprint in perpetuity. It is made available under aCC-BY-NC-ND 4.0 International license. Summary • As angiosperms became one of the megadiverse groups of macroscopic eukaryotes, they forged modern ecosystems and promoted the evolution of extant terrestrial biota. Unequal distribution of species among lineages suggests that diversification, the process which 20 ultimately determines species-richness, acted differentially through angiosperm evolution. • We investigate how angiosperms became megadiverse by identifying the phylogenetic and temporal placement of exceptional radiations, by combining the most densely fossil- calibrated molecular clock phylogeny with a Bayesian model that identifies diversification shifts among evolutionary lineages and through time.