Embryos of an early Jurassic prosauropod dinosaur and their evolutionary significance.

@article{Reisz2005EmbryosOA,
  title={Embryos of an early Jurassic prosauropod dinosaur and their evolutionary significance.},
  author={Robert R. Reisz and Diane Scott and Hans-Dieter Sues and David C. Evans and Michael A Raath},
  journal={Science},
  year={2005},
  volume={309 5735},
  pages={761-4}
}
Articulated embryos from the Lower Jurassic Elliot Formation of South Africa are referable to the prosauropod Massospondylus carinatus and, together with other material, provide substantial insights into the ontogenetic development in this early dinosaur. The large forelimbs and head and the horizontally held neck indicate that the hatchlings were obligate quadrupeds. In contrast, adult Massospondylus were at least facultatively bipedal. This suggests that the quadrupedal gait of giant… CONTINUE READING