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Definitive fossil evidence for the extant avian radiation in the Cretaceous
Long-standing controversy surrounds the question of whether living bird lineages emerged after non-avian dinosaur extinction at the Cretaceous/Tertiary (K/T) boundary or whether these lineagesExpand
A Basal Dromaeosaurid and Size Evolution Preceding Avian Flight
Fossil evidence for changes in dinosaurs near the lineage leading to birds and the origin of flight has been sparse. A dinosaur from Mongolia represents the basal divergence within Dromaeosauridae.Expand
Gigantism and comparative life-history parameters of tyrannosaurid dinosaurs
How evolutionary changes in body size are brought about by variance in developmental timing and/or growth rates (also known as heterochrony) is a topic of considerable interest in evolutionaryExpand
Growth curve of Psittacosaurus mongoliensis Osborn (Ceratopsia: Psittacosauridae) inferred from long bone histology
Abstract The skeleton undergoes substantial histological modification during ontogeny in association with longitudinal growth, shape changes, reproductive activity, and fatigue repair. This variationExpand
A Jurassic ceratosaur from China helps clarify avian digital homologies
Theropods have traditionally been assumed to have lost manual digits from the lateral side inward, which differs from the bilateral reduction pattern seen in other tetrapod groups. This unusualExpand
Coincident development of sesamoid bones and clues to their evolution
Sesamoid bones form within tendons in regions that wrap around bony prominences. They are common in humans but variable in number. Sesamoid development is mediated epigenetically by local mechanicalExpand
Evolution of the biomechanical material properties of the femur
The biomechanical performance of long bones is dictated by four key factors: element size, element shape, loading conditions, and material properties. Our understanding of the latter of these hasExpand
Assessing dinosaur growth patterns: a microscopic revolution.
  • G. Erickson
  • Biology, Medicine
  • Trends in ecology & evolution
  • 1 December 2005
Some of the longest standing questions in dinosaur paleontology pertain to their development. Did dinosaurs grow at slow rates similar to extant reptiles or rapidly similar to living birds andExpand
A new feathered maniraptoran dinosaur fossil that fills a morphological gap in avian origin
Recent fossil discoveries have substantially reduced the morphological gap between non-avian and avian dinosaurs, yet avians including Archaeopteryx differ from non-avian theropods in their limbExpand
The ontogeny of bite-force performance in American alligator (Alligator mississippiensis)
American alligators Alligator mississippiensis undergo major transformations in morphology and ecology during development. These include several thousand-fold changes in body mass, modified snout andExpand