How do you kill a ceadeus in monster hunter tri?

Im on 4 Star Chief's quest and i defeated shogun ceanataur thrice.I got the others(helm,legs,tasset and plate) already but just cant unlock the gauntlets.I really need it if you know any information please tell me!

Answer:

You have to obtain 1 Ceanataur Pincer. You can obtain it by breaking both of the Shogun or Daimyo Ceanataur's pincers in battle or by capturing it.