Reading through this new paper and I can't help but think of @davehone.bsky.social's older research on claws. The keratin sheaths are ludicrously longer than the ungual bones!
www.nature.com/articles/s41...
nature.com
Fig. 2: Norellraptor barsboldi 130108-MHGU-F4281, appendicular elements. | Nature Communications | Nature Communications
figure 2