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Re: Allosaur skin

I wrote:
Quoting the abstract:
"The left side of the body preserves a 30 cm squared skin impression
consisting of small scales 2-3 mm in diameter.  This suggests that
allosaurs possessed scaly integument.  This represents the most derived
tetanuran to retain this character, otherwise present in more basal
theropods such as _Carnotaurus_."

"fam jansma" <fam.jansma@tiscali.nl> responded:
Strange to find that a relatively basal one like Sinosauropteryx does have
feathers, perhaps it is size related after all and we all should start
drawing our tyrannosaurs scaly.

See http://www.dinosaur.net.cn/dino00174.jpg and http://www.dinosaur.net.cn/dino00146.jpg and http://www.dinosaur.net.cn/dino00149.jpg. _Sinosauropteryx_, being a basal coelurosaur, is more closely related to birds than _Allosaurus_ is, because _Allosaurus_ is a neotetanuran but not a coelurosaur. It may be that feathers are a synapomorphy of the clade Coelurosauria, in which case only coelurosaurs would possess this feature.

"Dino Guy" Ralph W. Miller III
Docent at the California Academy of Sciences
proud member of the Society of Vertebrate Paleontology