AnkylopollexiaCerapodaDinosauriaGenasauriaHadrosauridaeHadrosauriformesHadrosauroideaHadrosauromorphaIguanodontiaLate CretaceousNeornithischiaNorth AmericaOrnithischiaOrnithopodaStyracosterna

Ornithotarsus immanis

Dinosaur: Ornithotarsus immanis

Cretaceous: 83.6–72.1 Ma
Type: Ornithopod

Length*:11.2 m36.7 ft
Weight*:5.6 tons12,346 lb
ESR: 1 / 4 (estimated size reliability)
*The largest known specimen



Sources

Material: Left distal tibia, astragalus, calcaneum, and distal fibula fragment.
References: Prieto-Marquez, A., Weishampel, D.B., and Horner, J.R. (2006). "The dinosaur Hadrosaurus foulkii, from the Campanian of the East Coast of North America, with a reevaluation of the genus.".

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