The laterosphenoid bone of early archosauriforms

@article{Clark1993TheLB,
  title={The laterosphenoid bone of early archosauriforms},
  author={James M. Clark and Johann Welman and Jacques A. Gauthier and J. Michael Parrish},
  journal={Journal of Vertebrate Paleontology},
  year={1993},
  volume={13},
  pages={48-57}
}
ABSTRACT The laterosphenoid is an ossification of the pila antotica neurocranial cartilage in the anterior sidewall of the braincase of crocodylians and birds. Contrary to published reports, the bone is present in the basal archosauriforms Proterosuchus fergusi, Euparkeria capensis, and Erythrosuchidae, taxa that diverged prior to the origin of the archosaurian crown group. Its presence is thus a synapomorphy of Archosauriformes rather than of Archosauria. The bone appears to have been induced… 
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