To no one’s surprise the new Lower Cretaceous pterosaur tracks (Xing et al. 2013) belong to a species close to Jidapterus (Fig. 1), with its big hand, narrow foot and short toes nearly all the same length except digit 1 is shorter. Interesting that the claw marks did not impress.
I’m not sure about the relative lengths of the phalanges in manual digit 3. Sister taxa appear to go both ways (long middle phalanx and short) and the poor data I have is fuzzy at best for the tiny bones. If anyone has better data for any Lower Cretaceous Chinese azhdarchids, please send!
Xing L, Lockley MG, Piñuela L, Zhang J-P, Klein H, Li D-Q, Wang F-P 2013. Pterosaur trackways from the Lower Cretaceous Jiaguan Formation (Barremian–Albian) of Qijiang, Southwest China. Palaeo 661. doi: 10.1016/j.palaeo.2013.09.003