Biologists presently identify three subspecies of this monkey, which can be distinguished primarily by the length of their tails, as well as by certain skeletal and dental features.
Ahli biologi sekarang mengidentifikasi tiga subspesies dari kera ini, yang dapat dibedakan terutama melalui panjang ekor mereka, serta melalui tulang rangka tertentu dan karakteristik giginya.