Horn Sheaths

Some articles on horn sheaths, horn:

Scipionyx - Description - Soft Tissues - Horn Sheaths
... On all claws preserved in the fossil — those of the feet have all been lost — horn sheaths are visible ... bottom which suggests that the original horn material is still present — but this has not yet been directly tested by a chemical analysis for fear of damaging ... The horn sheaths of the hand claws extend the bony cores by about 40%, scythe-like continuing the bone curve and ending in sharp points ...

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