Ankylopollexia

Ankylopollexia is an extinct clade of dinosaurs within the Ornithischia. They lived from 156 to 66 million years ago.McDonald A.T. 2012. Phylogeny of Basal Iguanodonts (Dinosauria: Ornithischia): An Update. PLoS ONE 7 (5): e36745. doi:10.1371/journal.pone.0036745 

One of the most famous and most derived members of the Ankylopollexia clade is the Iguanodon. The Hadrosaurs are also in this group.

The name stems from the Greek word “ankylos” (meaning stiff or fused) and the Latin word “pollex”, meaning thumb.Sereno P.C. 1986. Phylogeny of the bird-hipped dinosaurs (order Ornithischia). National Geographic Research 2 (2): 234–56  

References

Category:Dinosaurs
Category:Ornithischia
Category:Iguanodonts