The body of the allosaur designs used in the films was allegedly based on the common species Allosaurus fragilis, but the skull anatomy was based on Allosaurus jimmadseni (which was, at the time, classified as A. fragilis). Because the skull anatomy is the primary means of differentiating these two species, Jurassic-Pedia has chosen to classify the species appearing in the films as A. jimmadseni.

Film

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