Sauropod Trackways, Evolution, and Behavior

@article{Day2002SauropodTE,
  title={Sauropod Trackways, Evolution, and Behavior},
  author={Julia J Day and Paul Upchurch and David B. Norman and Andrew Scott Gale and H. Philip Powell},
  journal={Science},
  year={2002},
  volume={296},
  pages={1659 - 1659}
}
We report the discovery and analysis of sauropod trackways exposed on a bedding surface of the White-Limestone formation (1) at Ardley Quarry, Oxfordshire, United Kingdom. 
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TLDR
A unique dual-gauge trackway from a bipedal theropod dinosaur from the Middle Jurassic in this locality is discovered, which indicates that these large theropods were able to run and that they used different hindlimb postures for walking and running. Expand
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TLDR
Forked chevrons, which have played such an important role in previous studies of sauropod phylogeny, are here considered to have evolved twice within the Sauropoda, which may reflect a correlation between chevron shape and the use of the tail as a weapon within these twosauropod families. Expand
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