AverostraDinosauriaEarly CretaceousEusaurischiaMegalosauroideaNeotheropodaOrionidesSaurischiaSouth AmericaSpinosauridaeTetanuraeTheropoda

Irritator challengeri 

Dinosaur: Irritator challengeri 

Type: Theropod

Length*:6.2 m20.3 ft
Weight*:500 kg1,102 lb
ESR: 2 / 4 (estimated size reliability)
*The largest known specimen


Material: Incomplete skull, teeth, partial mandibles.
References: Sales, M.A.F.; Schultz, C.L. (2017). "Spinosaur taxonomy and evolution of craniodental features: Evidence from Brazil".


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