🦖 Hey Witmer, Like Sue, Tyrannosaurus Imperator is the oldest, fossils are also found in Hell Creek, Lance, Laramie, Arapahoe, McRae, North Horn and Javelina Formations, the Distribution is Montana, Wyoming, Colorado Dakotas, possibly New Mexico, Utah and even Texas, T-Imperator means, "Tyrant Lizard Emperor".
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