Dodatak:Abecedni popis diapsida: Y

Ya

• Yabeinosaurus youngi
• Yabeinosaurus,
• Yantarogekko

Yi

†Yinlong Xu et al. 2006

• †Yinlong downsi Xu et al. 2006

Diapsida → Ornithischia → Chaoyangsauridae

Yo

• Yonghesuchus,
• Youngina
• Youngina,
• Younginidae †
• Younginiformes
• Younginoidea

Yu

• Yunguisaurus
• Yuzhoupliosaurus Zhang, 1985 †