What unique structure do Pygmy Marmosets possess on nearly all their digits instead of the flat nails common to primates like humans?

Answer

Sharp, claw-like nails

Their hands and feet feature sharp, claw-like nails on every digit except the hallux (big toe), which is essential for maintaining superior traction while clinging vertically to tree bark.

What unique structure do Pygmy Marmosets possess on nearly all their digits instead of the flat nails common to primates like humans?
animalcharacteristicPrimateFinger Monkey