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(BMC Evol Biol[TA]) articles in PubMed
3,258 results
  • Synchrotron imaging of dentition provides insights into the biology of Hesperornis and Ichthyornis, the "last" toothed birds. [Journal Article]
  • BMC Evol Biol 2016; 16(1):178BE
  • Dumont M, Tafforeau P, … Louchart A
  • CONCLUSIONS: Our results allow comparison with other archosaurs and also mammals, with implications regarding dental character evolution across amniotes. Some dental features of the 'last' toothed birds can be interpreted as functional adaptations related to diet and mode of predation, while others appear to be products of their peculiar phylogenetic heritage. The autapomorphic Hesperornis groove might have favoured firmer root attachment. These observations highlight complexity in the evolutionary history of tooth reduction in the avian lineage and also clarify alleged avian dental characteristics in the frame of a long-standing debate on bird origins. Finally, new hypotheses emerge that will possibly be tested by further analyses of avian teeth, for instance regarding dental replacement rates, or simplification and thinning of enamel throughout the course of early avian evolution.
  • Molecular phylogeny and timing of diversification in Alpine Rhithrogena (Ephemeroptera: Heptageniidae). [Journal Article]
  • BMC Evol Biol 2016; 16(1):194BE
  • Vuataz L, Rutschmann S, … Sartori M
  • CONCLUSIONS: Our species-level analyses of five gene regions provide clearer definitions of species groups within European Rhithrogena. A constant speciation rate over time suggests that the paleoclimatic fluctuations, including the Pleistocene glaciations, did not significantly influence the tempo of diversification of Alpine species. A downstream diversification trend in the hybrida and alpestris species groups supports a previously proposed headwater origin hypothesis for aquatic insects.
  • The phylogeny of brown lacewings (Neuroptera: Hemerobiidae) reveals multiple reductions in wing venation. [Journal Article]
  • BMC Evol Biol 2016; 16:192BE
  • Garzón-Orduña IJ, Menchaca-Armenta I, … Winterton SL
  • CONCLUSIONS: Our phylogenetic hypothesis and divergence times analysis suggest that extant hemerobiids originated around the end of the Triassic and evolved as three distinct clades that diverged from one another during the Late Jurassic to Early Cretaceous. Contrary to earlier phylogenetic hypotheses, Carobius Banks (Carobiinae) is sister to the previously unplaced genus Notherobius New in a clade more closely related to Sympherobiinae, Megalominae and Zachobiellinae subfam. nov. The addition of taxa which are not available for DNA sequencing should be the focus of future studies, especially Adelphohemerobius Oswald, which is particularly important to test our inferences regarding the evolution of wing venation in Hemerobiidae.
  • Unappreciated diversification of stem archosaurs during the Middle Triassic predated the dominance of dinosaurs. [Journal Article]
  • BMC Evol Biol 2016; 16:188BE
  • Foth C, Ezcurra MD, … Butler RJ
  • CONCLUSIONS: Our study indicates that non-archosaurian archosauromorphs were highly diverse components of terrestrial ecosystems prior to the major radiation of archosaurs, including dinosaurs, while disparity patterns of the Ladinian and Carnian indicate a gradual faunal replacement of stem archosaurs by the crown group, including a short interval of partial overlap in morphospace during the Ladinian.
  • Evolution of long centromeres in fire ants. [Journal Article]
  • BMC Evol Biol 2016; 16:189BE
  • Huang YC, Lee CC, … Wang J
  • CONCLUSIONS: Our results are consistent with a model of simple runaway centromere expansion due to centromere drive. We suggest expanded centromeres may be more prevalent in hymenopteran insects, which use haplodiploid sex determination, than previously considered.
  • Adaptive evolution of seed oil content in angiosperms: accounting for the global patterns of seed oils. [Journal Article]
  • BMC Evol Biol 2016; 16:187BE
  • Sanyal A, Decocq G
  • CONCLUSIONS: The study provides us an insight into the biogeographical distribution and the adaptive role of seed oil content in plants. The study indicates that multiple seed traits like seed oil content and the fatty acid composition of the seed oils determine the fitness of the plants and validate the adaptive hypothesis that seed oil quantity and quality are crucial to plant adaptation.
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