[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index][Subject Index][Author Index]
Re: New refs....
They have the legs, lower back vertebrae, and part of the wings on the slab.
The leg feathers are shorter and less aerodynamic than the wing feathers, but
Zhou says they are more aerodynamic than those of Archaeopteryx. He envisions
the leg feathers serving as a brake or rudder to help landing in birds with
reduced tails and without the long tail feathers of modern birds. The 23
October New Scientist will have a short report. The Nature paper is at
At 8:10 PM +0200 10/20/04, Alessandro Marisa wrote:
>Dear Listmembers I think that this new paper could interested someone,
>expecially the Theropod/Bird fun.
>Zhang F. and Zhou Z. 2004 Leg feathers in an Early Cretaceous bird. Nature
>Follow the abstract:
>Here the authors describe a fossil of an enantiornithine bird from the Early
>Cretaceous period in China that has substantial plumage feathers attached to
>its upper leg (tibiotarsus). The discovery could be important in view of the
>relative length and aerodynamic features of these leg feathers compared with
>those of the small 'four-winged' gliding dinosaur Microraptor and of the
>earliest known bird, Archaeopteryx. They may be remnants of earlier long,
>aerodynamic leg feathers, in keeping with the hypothesis that birds went
>through a four-winged stage during the evolution of flight.
Jeff Hecht, science & technology writer
Boston Correspondent: New Scientist magazine
Contributing Editor: Laser Focus World
525 Auburn St., Auburndale, MA 02466 USA
v. 617-965-3834; fax 617-332-4760