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Possible Skin of Tyrannosaurids

If Tyrannosaurids evolved from smaller coelurosaurs that were covered with downy fibers, and may have been secondarily featherless, is it probable that they were not scaly after all, but rather largely wrinkly-skinned, with scales limited to their heads and legs?

(I don't recall whether the little coelurosaur specimens found over the past few years with integumentary fibers also had scaly skin impressions.)

Larry Dunn
"You want the truth? You can't HANDLE the truth!" -- Gregory Paul on feathered dinosaurs, 1988

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