In short, Palmer and Dyke are correct about the medial orientation of the pteroid, as was Bennett's earlier analysis that demonstrated the medial orientation. JimC Agreed. DavidP Palmer, C. and Dyke, G.J. (in press). "Biomechanics of the unique pterosaur pteroid", _Proceedings of the Royal Society Series B, Biological Sciences_, doi: 10.1098/rspb.2009.1899