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- W2889011193 abstract "Premise of the Study Conifers are an important living seed plant lineage with an extensive fossil record spanning more than 300 million years. The group therefore provides an excellent opportunity to explore congruence and conflict between dated molecular phylogenies and the fossil record. Methods We surveyed the current state of knowledge in conifer phylogenetics to present a new time-calibrated molecular tree that samples ~90% of extant species diversity. We compared phylogenetic relationships and estimated divergence ages in this new phylogeny with the paleobotanical record, focusing on clades that are species-rich and well known from fossils. Key Results Molecular topologies and estimated divergence ages largely agree with the fossil record in Cupressaceae, conflict with it in Araucariaceae, and are ambiguous in Pinaceae and Podocarpaceae. Molecular phylogenies provide insights into some fundamental questions in conifer evolution, such as the origin of their seed cones, but using them to reconstruct the evolutionary history of specific traits can be challenging. Conclusions Molecular phylogenies are useful for answering deep questions in conifer evolution if they depend on understanding relationships among extant lineages. Because of extinction, however, molecular datasets poorly sample diversity from periods much earlier than the Late Cretaceous. This fundamentally limits their utility for understanding deep patterns of character evolution and resolving the overall pattern of conifer phylogeny." @default.
- W2889011193 created "2018-09-07" @default.
- W2889011193 creator A5003016723 @default.
- W2889011193 creator A5030101390 @default.
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- W2889011193 creator A5054696030 @default.
- W2889011193 creator A5065516141 @default.
- W2889011193 creator A5079737193 @default.
- W2889011193 date "2018-08-29" @default.
- W2889011193 modified "2023-10-12" @default.
- W2889011193 title "An overview of extant conifer evolution from the perspective of the fossil record" @default.
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