Archaeopteryx and the Origin of Flight

@article{Ostrom1974ArchaeopteryxAT,
  title={Archaeopteryx and the Origin of Flight},
  author={John Harold Ostrom},
  journal={The Quarterly Review of Biology},
  year={1974},
  volume={49},
  pages={27 - 47}
}
  • J. H. Ostrom
  • Published 1 March 1974
  • Biology
  • The Quarterly Review of Biology
Reexamination of the specimens of Archaeopteryx, which constitute the only direct evidence pertaining to the habits and mode of life of the earliest stages of avian evolution, indicates that neither the highly favored arboreal theory nor the much critized cursorial theory offers adequate explanation for the origin of avian flight. The osteology of Archaeopteryx, in virtually every detail, is indistinguishable from that of contempraneous and succeeding coelurosaurian dinosaurs-especially in the… 

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  • Geography, Environmental Science
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References

SHOWING 1-10 OF 31 REFERENCES

Brain Evolution and Archaeopteryx

The new interpretation of Archaeopteryx results from the discovery of the true midline suture of the skull a few millimetres away from the line that has until now been thought to be the midline.

Odontornithes; a Monograph of the Extinct Toothed Birds of North America

WEST from the valley of the Mississippi the stratified formations which underlie the prairie region spread over thousands of square miles nearly as horizontal as when they were deposited. Here and

THE IMPORTANCE OF THE NERVOUS SYSTEM IN THE EVOLUTION OF ANIMAL FLIGHT

The writer believes, then, that in view of the above evidence showing the existence of a former wet tropical belt across India between the eastern Himalayas and the west coast north of the

Volant Adaptation in Vertebrates

1. Volant evolution has occurred seventeen times among vertebrates, ten of which are merely adaptations for more or less prolonged soaring leaps, while in seven instances in all probability true

Quantitative Assessment of the Flight of Archaeopteryx

THE coracoids, humeri and sternum of Archaeopteryx indicate that it was a poor flier1. Recent work on pigeon flight2 suggests that an analysis of the strength of the wing bones should allow a

On How an Archosaurian Scale Might Have Given Rise to an Avian Feather

The homing ability of the neotropica~l bat Phyllostomus hastatus, with evidence for visual orientation, and the random element in bird navigation are studied.

Reconsideration of the Evidence for a Common Dinosaur-Avian Stem in the Permian. Dinosaur Contributions, No. 4

  • H. Osborn
  • Environmental Science
    The American Naturalist
  • 1900
THE relation of dinosaurs to birds has been one of the most attractive problems of comparative anatomy during the thirtyseven years which have elapsed since Gegenbaur's observation that the

The Genesis of Species

IT is a remarkable illustration of the apparently fitful manner in which our knowledge of Nature increases, that the event which has probably been more fruitful than any other during the present

ADAPTATION AND THE FORM–FUNCTION COMPLEX

The current revival of morphology is heralded by a flourish of studies in functional anatomy with the general result being a renewed focus of interest in the problem of organic form. Recent

ADAPTIVE EVOLUTION IN THE AVIAN WING

The form of a bird's wing is so basically important to the successful exploitation of an ecological niche that it inevitably yields many instructive examples of adaptive evolution and it may be profitable to examine the principal categories of wing type and to see how they correlate with special requirements.