Sustained miniaturization and anatomical innovation in the dinosaurian ancestors of birds

@article{Lee2014SustainedMA,
  title={Sustained miniaturization and anatomical innovation in the dinosaurian ancestors of birds},
  author={Michael S. Y. Lee and Andrea Cau and Darren Naish and Gareth J. Dyke},
  journal={Science},
  year={2014},
  volume={345},
  pages={562 - 566}
}
Turning large dinosaurs into small birds Most paleontologists agree that birds are descended from dinosaurs. How did such large terrestrial or aquatic animals evolve into small feathered fliers? Lee et al. used two large databases of theropod morphology to explore possible evolutionary patterns that may have driven this dramatic transformation (see the Perspective by Benton). They found no clear pattern of miniaturization across the entire clade of Theropoda. However, several lines of evidence… Expand
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References

SHOWING 1-10 OF 57 REFERENCES
Rates of dinosaur limb evolution provide evidence for exceptional radiation in Mesozoic birds
TLDR
A Cretaceous adaptive radiation of stem-group birds was enabled by restructuring of the terrestrial locomotor module, which represents a key innovation and illustrates the importance of fossil data for understanding the macroevolutionary processes generating modern biodiversity. Expand
Tyrannosaur Paleobiology: New Research on Ancient Exemplar Organisms
TLDR
The biology and evolutionary history of tyrannosaurs are reviewed and their phylogenetic relations are updated to include several new fossils, showing that tyrannosaurs originated by the Middle Jurassic but remained mostly small and ecologically marginal until the latest Cretaceous. Expand
Birds have paedomorphic dinosaur skulls
TLDR
This study uses a geometric morphometric approach integrating developmental, neontological and palaeontological data to show that the heterochronic process of paedomorphosis, by which descendants resemble the juveniles of their ancestors, is responsible for several major evolutionary transitions in the origin of birds. Expand
Feathered Non-Avian Dinosaurs from North America Provide Insight into Wing Origins
TLDR
The Ornithomimus specimens, recovered from Upper Cretaceous deposits of Alberta, Canada, provide new insights into dinosaur plumage and the origin of the avian wing, and show that primordial wings originated earlier than previously thought, among non-maniraptoran theropods. Expand
A Basal Dromaeosaurid and Size Evolution Preceding Avian Flight
TLDR
Change in theropod body size leading to flight's origin was not unidirectional, and the two dinosaurian lineages most closely related to birds, dromaeosaurids and troodontids, underwent four independent events of gigantism, and in some lineages size increased by nearly three orders of magnitude. Expand
The origin and early radiation of dinosaurs
Abstract Dinosaurs were remarkably successful during the Mesozoic and one subgroup, birds, remain an important component of modern ecosystems. Although the extinction of non-avian dinosaurs at theExpand
No evidence for directional evolution of body mass in herbivorous theropod dinosaurs
TLDR
This work reconstructs body mass in the three major subclades of non-avian theropod dinosaurs whose ecomorphology is correlated with extrinsic evidence of at least facultative herbivory in the fossil record, and suggests that the hypothesis can be extrapolated to herbivorous lineages across geological time scales. Expand
The phylogeny of Tetanurae (Dinosauria: Theropoda)
TLDR
An exhaustive examination of all basal tetanurans and all existing character data, taking advantage of recent discoveries and adding new morphological, temporal and geographic data achieved significantly improved phylogenetic resolution. Expand
A Jurassic avialan dinosaur from China resolves the early phylogenetic history of birds
TLDR
The complete skeleton of a new paravian from the Tiaojishan Formation of Liaoning Province, China is described and including it in a comprehensive phylogenetic analysis for basal Paraves recovers Archaeopteryx as the basal-most avialan and implies that the early diversification of Paraves and Avialae took place in the Middle–Late Jurassic period. Expand
Rise of dinosaurs reveals major body-size transitions are driven by passive processes of trait evolution
TLDR
A new body-size dataset of more than 400 therapsid and archosauromorph species spanning the Late Permian–Middle Jurassic is analysed, indicating intrinsic, biological factors are more important than the external environment and maximum size of Middle–early Late Triassic archosuromorph predators exceeds that of contemporary herbivores. Expand
...
1
2
3
4
5
...