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Facebook Twitter Pinterest This ungual claw from a theropod yielded structures which appear to be red blood cells.

The claws would have been impressive, the authors describing the ungual phalanges, or claws, on the hands as “extremely large” and robust, about 3.5cm long.

Fore-feet with five toes; the first much more slender than the others, and with a smaller ungual phalange and nail; the second, though the longest, also slender.

The branch to digit IV inserts on the base of the ungual phalanx, with one tendinous slip to the distal end of the third phalanx and another to the distal end of the fourth.

Inter-phalangeal Dislocation.—The second and the ungual phalanges may be displaced backwards, forwards, or to the side.