[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index][Subject Index][Author Index]
Re: Ornithomimus had feathers and "display" winglike forelimbs
Is there a picture of the fossil online?
On Oct 25, 2012, at 11:13 AM, Ben Creisler wrote:
> From: Ben Creisler
> New in Science:
> Darla K. Zelenitsky, François Therrien, Gregory M. Erickson,
> Christopher L. DeBuhr, Yoshitsugu Kobayashi, David A. Eberth, and
> Frank Hadfield (2012)
> Feathered Non-Avian Dinosaurs from North America Provide Insight into
> Wing Origins.
> Science 338(6106): 510-514
> DOI: 10.1126/science.1225376
> Previously described feathered dinosaurs reveal a fascinating record
> of feather evolution, although substantial phylogenetic gaps remain.
> Here we report the occurrence of feathers in ornithomimosaurs, a clade
> of non-maniraptoran theropods for which fossilized feathers were
> previously unknown. The Ornithomimus specimens, recovered from Upper
> Cretaceous deposits of Alberta, Canada, provide new insights into
> dinosaur plumage and the origin of the avian wing. Individuals from
> different growth stages reveal the presence of a filamentous feather
> covering throughout life and winglike structures on the forelimbs of
> adults. The appearance of winglike structures in older animals
> indicates that they may have evolved in association with reproductive
> behaviors. These specimens show that primordial wings originated
> earlier than previously thought, among non-maniraptoran theropods.