Re: four winged Archaeopteryx

[mariusromanus@aol.com]

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 
IÂ
> 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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