AnkylopollexiaCerapodaDinosauriaGenasauriaHadrosauriformesHadrosauroideaHadrosauromorphaIguanodontiaLate CretaceousNeornithischiaNorth AmericaOrnithischiaOrnithopodaStyracosterna

Protohadros byrdi 

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Dinosaur: Protohadros byrdi 

Cretaceous: 100.5–93.9 Ma
Type: Ornithopod

Length*:7.5 m24.6 ft
Weight*:2.4 t5,291 lb
ESR: 2 / 4 (estimated size reliability)
*The largest known specimen



Locations


Sources

Material: Skull and fragments. Referred teeth, skeletons ?
References: Head J.J. (1998). "A new species of basal hadrosaurid (Dinosauria, Ornithopoda) from the Cenomanian of Texas".

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