Yamaceratops dorngobiensis

Yamanasaurus lojaensis

Yamatosaurus izanagii

Yanbeilong ultimus

Yandusaurus hongheensis

Yangchuanosaurus shangyouensis

Yaverlandia bitholus

Yehuecauhceratops mudei

Yi qi

Yimenosaurus youngi

Yingshanosaurus jichuanensis

Yinlong downsi

Yixianosaurus longimanus

Yizhousaurus sunae

Yongjinglong datangi

Ypupiara lopai

Yuanmouraptor jinshajiangensis

Yuanmousaurus jiangyiensis

Yuanyanglong bainian

Yueosaurus tiantaiensis

Yulong mini

Yunganglong datongensis

Yungmenglong ruyangensis

Yunnanosaurus huangi

Yunyangosaurus puanensis

Yurgovuchia doellingi

Yutyrannus huali

Yuxisaurus kopchicki

Yuzhoulong qurenensis