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Re: Allosaur skin
"fam jansma" <firstname.lastname@example.org> responded:
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_."
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/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