I roto i te 1991 "Big Al" (MOR 693), i kitea he 95% oti, tauira āpitihanga o Allosaurus. whanganga te reira e pā ana ki 8 mita (e pā ana ki 26 ft) i roto i te roa. i whakaahuatia MOR 693 tata Shell, Wyoming, e te tahi Museum o te Rockies me University o Wyoming Geological Museum rōpū. i kitea tenei kopu e te rōpū Swiss, arahina e Kirby Siber. i roto i te 1996 kitea te rōpū taua te tuarua Allosaurus, "Big Al Two", i te mea te pai i tiakina kopu o tona ahua ki te rā.
Ko te tau 1991