[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index][Subject Index][Author Index]
Re: Theropod herbivory - parallel evolution or one clade?
David Marjanovic wrote:
That's an understatement. Since its description everyone seems to agree
*Incisivosaurus* is the basalmost known oviraptorosaur. The oviraptorosaurs
and the segnosaurs seem to be each other's closest relatives, so there is a
Sereno erected the name Oviraptoriformes for the
therizinosaur-oviraptorosaur clade. _Incisivosaurus_ and
_Protarchaeopteryx_ (if they are not one and the same) are both regarded as
basal oviraptorosaurs. _Shanyangosaurus_ may belong here too, or as a basal
If _Incisivosaurus_ is a herbivore, as interpreted by Xu et al. (2002), then
herbivory/omnivory may be primitive for the Oviraptoriformes. Given the
suggestion that troodontids may have been omnivorous, this dietary
preference may be primitive for a much wider group, like Maniraptora. Maybe
the immediate ancestors of birds were omnivores, and began climbing trees in
order to nibble on leaves? Many evolutionary scenarios have focused on the
possible role of predation in the evolution of avian flight, but a possible
role for herbivory has received far less attention, AFAIK.
Get the latest Windows Live Messenger 8.1 Beta version. Join now.