Spatiotemporal variability in the South American mammalian fossil record and its impact on macroevolutionary inference DOI Creative Commons
Pedro Danel de Souza Ugarte, João C. S. Nascimento, Mathias M. Pires

et al.

Frontiers in Mammal Science, Journal Year: 2025, Volume and Issue: 3

Published: Jan. 7, 2025

Macroevolutionary studies using the fossil record have provided valuable information about evolutionary history of mammals, helping us to understand some processes underlying shifts in diversification dynamics. Yet, most on mammal focused Northern Hemisphere. The general view that quality South American clades is too limited has precluded continental-level macroevolutionary continent. However, adequately evaluate how much we can learn from record, need limitations affect uncertainty estimates. Here, investigated spatiotemporal distribution occurrences eleven mammalian and used a Bayesian approach accounts for incompleteness analyze estimates times origination extinction, extinction rates are affected by record. We show main shortcoming not its overall but unevenness. Most early immigrant lower preservation than late clades. Accordingly, root age larger earlier Despite were still able identify significant rate throughout may be explained environmental changes. also find discrepancies with patterns inferred phylogenies, which suggest detect fossils might reflect regional trends or driven lineages higher preservation. Contrasting results obtained different approaches, such as molecular data, where they converge diverge, help delineate spatial scale phylogenetic scope observed patterns. Our work contributes better understanding opportunities research evolution mammals

Language: Английский

The fate of South America’s endemic mammalian fauna in response to the most dramatic Cenozoic climate disruption DOI Creative Commons
Lucas Buffan, Fabien L. Condamine, Narla Shannay Stutz

et al.

Proceedings of the National Academy of Sciences, Journal Year: 2025, Volume and Issue: 122(20)

Published: May 5, 2025

Around 34 Mya, the Eocene−Oligocene transition (EOT) marked most dramatic global climatic cooling of Cenozoic. On a planetary scale, paleontological evidence suggests that this was associated with major faunal turnovers, sometimes even regarded as mass extinction crisis. In South America, there is no consensus on response endemic mammals to transition. Here, using vetted fossil dataset and cutting-edge Bayesian methods, we analyzed dynamics American mammal (SAM) diversification their possible drivers across latitude (tropical vs. extratropical), taxonomic groups, trophic guilds throughout ( ca. 56 23 Ma). Our results did not any among SAM at EOT. Instead, they experienced gradual long-term diversity decline from middle Eocene early Oligocene, followed by sudden waxing-and-waning large taxonomic—but ecological—turnover. Tropical extratropical lineages have had very distinct macroevolutionary histories. No effective change in pace which tropical diversify found, thus favoring stability hypothesis proposed Wallace. Diversity-dependent effects, temperature, Andean uplift were recovered probable period. Contrasting casts doubt common primarily linking Oligocene changes grassland expansion. findings illustrate uniqueness deep-time interplay between physical environment context shift, highlighting need consider regional idiosyncrasies for understanding coevolution life climate.

Language: Английский

Citations

0
Spatiotemporal variability in the South American mammalian fossil record and its impact on macroevolutionary inference DOI Creative Commons
Pedro Danel de Souza Ugarte, João C. S. Nascimento, Mathias M. Pires

et al.

Frontiers in Mammal Science, Journal Year: 2025, Volume and Issue: 3

Published: Jan. 7, 2025

Macroevolutionary studies using the fossil record have provided valuable information about evolutionary history of mammals, helping us to understand some processes underlying shifts in diversification dynamics. Yet, most on mammal focused Northern Hemisphere. The general view that quality South American clades is too limited has precluded continental-level macroevolutionary continent. However, adequately evaluate how much we can learn from record, need limitations affect uncertainty estimates. Here, investigated spatiotemporal distribution occurrences eleven mammalian and used a Bayesian approach accounts for incompleteness analyze estimates times origination extinction, extinction rates are affected by record. We show main shortcoming not its overall but unevenness. Most early immigrant lower preservation than late clades. Accordingly, root age larger earlier Despite were still able identify significant rate throughout may be explained environmental changes. also find discrepancies with patterns inferred phylogenies, which suggest detect fossils might reflect regional trends or driven lineages higher preservation. Contrasting results obtained different approaches, such as molecular data, where they converge diverge, help delineate spatial scale phylogenetic scope observed patterns. Our work contributes better understanding opportunities research evolution mammals

Language: Английский

Citations

0