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Re: four winged Archaeopteryx




Tim Williams wrote:

Perhaps this is why _Compsognathus_ and the Solnhofen pterosaurs are
'naked' - unlike their fuzz-covered cousins from Jehol and Karatau. An insulatory body covering might have been unnecessary in the warm, muggy conditions of Late Jurassic Europe.<<


Really???... Then what about said subject according to Frey, et alâ

Broili, F., 1938, Beobachtungen an Pterodactylus: Sitzungsberichte der Bayerischen Akademie der Wissenschaften, Mathematisch-naturwissenschaftliche Abteiilung, p. 139-154.

Frey, E., and Martill, D. M., 1998, Soft tissue preservation in a specimen of Pterodactylus kochi (WAGNER) from the Upper Jurassic of Germany: NeÃes Jahrbuch fur Geologie und Palaeontologie, Abhandlungen, v. 210, n. 3, p. 421-441.

Frey, E., Tischlinger, H., Buchy, M.-C., and Martill, D. M., 2003, New specimens of pterosauria (Reptilia) with soft parts with implications for pterosaurian anatomy and locomotion: In: Evolution and Palaeobiology of Pterosaurs, edited by Buffetaut, E., and Mazin, J.-M., Geological Society Special Publication, n. 217, p. 233-266.

Just to name a fewâ

And actually... by this logic... birds in the Amazon should be naked... along with jungle mammals.

Kris


-----Original Message----- From: twilliams_alpha@hotmail.com To: dinosaur@usc.edu Sent: Sat, 30 Sep 2006 4:58 PM Subject: Re: four winged Archaeopteryx

Dann Pigdon wrote:Â
Â
I get the impression that Archie's environment was fairly tropical, so
doubt archie really needed much insulation on its tail.Â
Â
Perhaps this is why _Compsognathus_ and the Solnhofen pterosaurs are 'naked' - unlike their fuzz-covered cousins from Jehol and Karatau. An insulatory body covering might have been unnecessary in the warm, muggy conditions of Late Jurassic Europe.Â
Â
If Archie didn'tÂ
get any aerodynamic benefit for such an extensive frond of tailÂ
feathers,Â
Â
Gatesy and Dial (1996) suggest that Archie's rectricial 'frond' served more for stabilization than maneuverability.Â
Â
CheersÂ
Â
TimÂ
Â



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