[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index][Subject Index][Author Index]

Re: Silesaurus and Trialestes



Jaime Headden wrote:

  The description of the carpus includes that it had elongated radiale and
ulnare, features unknown in dinosaurs, but possible in basal
dinosauromorphans given that animals ancestral to Archosauria have it, in
addition to crocodylomorphans.

I wasn't aware that ancestral archosaurs had this elongated radiale/ulnare too. In crocodylomorphs, this character effectively adds an extra joint to the forelimb, increasing the forelimb's swing. So perhaps the elongated proximal carpus is associated with rapid quadrupedal locomotion.

_________________________________________________________________
Is your PC infected? Get a FREE online computer virus scan from McAfee® Security. http://clinic.mcafee.com/clinic/ibuy/campaign.asp?cid=3963