I’m telling you, they’re everywhere.
Traditional paleontologists report the wing has no ungual on pterosaurs. Here (Fig. 1), yet another wing ungual could be found in a specimen of Pterodaustro (MIC-V263, Codorniú et al. 2013). (Unfortunately that little bone was ignored by Codorniú et al 2013.) Earlier we looked at several other wing ungual examples.
I think it’s unusual and atypical that the tip of m4.4, nearest the alleged ungual, is expanded so much. Not sure exactly what’s going on there. Let’s just throw this up as a possibility, despite its apparent clarity. Also unexpected is the texture on the broken portion of m4.4 that makes it look more like a drill bit.
Nice to see someone else is also tracing photographs
I have been vilified for tracing photographs using Adobe Photoshop (computer software). Here, it’s clear that Codorniú et al. (2013) traced the photograph of MIC-V263 (Fig. 2), the first step in DGS, because there is a perfect correspondence between drawing and photo. That doesn’t happen very often otherwise.
The gastroliths are all located between the ilia. This must have happened when the crop was shifted posteriorly during taphonomy.
Wing digit 5
I see some probable m4.5 elements (Fig. 3), but they are shifted from their typical orientation.
Pedal digit 5 appears to have one phalanx, but the end of p5.1 is a hinge joint and the next bone is barely visible beneath it.
Manual digit 3 is seen for the first time as longer than m digit 2. This is distinct from Ctenochasma in which the digits 2 and 3 are subequal. Manual 3.2 in Pterodaustro is not a disc. This was corrected in the reconstructions of both the adult (Fig. 4) and embryo. The femur also has a longer neck than I originally thought.
As always, I encourage readers to see specimens, make observations and come to your own conclusions. Test. Test. And test again.
Evidence and support in the form of nexus, pdf and jpeg files will be sent to all who request additional data.
Codorniú L, Chiappe LM and Cid FD 2013. First occurrence of stomach stones in pterosaurs, Journal of Vertebrate Paleontology, 33:3, 647-654.