[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index][Subject Index][Author Index]
RE: Major new paper on dromaeosaurids, with other significant maniraptoran info
Thomas R. Holtz, Jr. wrote:
Most oviraptorosaurs are propubic, or at least mesopubic, so reversals are
Ah yes. My bad.
I don't know about that, particularly if these critters went after very
small prey (lizards and the like). Wing feathers can take a fair amount
huge amount, but fair) of punishment in at least some living birds.
Yes. Indeed many birds use their wings for intraspecific combat - and even
have wing-spurs specialized for this purpose.
As for using the forelimbs for catching small prey (lizards and the like),
the trouble with this hypothesis is that maniraptoran hands do not appear to
be all that well adapted for seizing small prey. Large prey, yes - small
prey, maybe not. The semilunate carpal block ("swivel-wrist") constrained
motion of the hand outside of the mediolateral plane, and the long and
relatively inflexible fingers seem poorly adapted for one-handed grasping
and raking. According to Gishlick, the grasping/raking ability primitive
for the theropod manus was actually lost in the _Deinonychus_ manus.
Gishlick did describe how maniraptorans could grasp small prey in a
two-handed 'scooping' fashion; but IMHO this would be inferior to the method
that was employed by more primitive theropods - just grabbing the prey with
Express yourself instantly with MSN Messenger! Download today - it's FREE!