"Sue": FMNH PR2081 Specimens of Tyrannosaurus

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sue specimen, field museum of natural history, chicago


susan hendrickson of black hills institute discovered best-preserved tyrannosaurus known, in hell creek formation near faith, south dakota, on 12 august 1990. specimen, named sue in honor of discoverer, became embroiled in legal battle on ownership. land on fossil discovered found lie within cheyenne river indian reservation , occupied family of maurice williams, native american of sioux tribe. in 1992, williams claimed still owned fossil, black hills institute had paid him usd 5,000. local cheyenne river sioux tribe, of williams member, claimed ownership. fossil, many thousands of pages of field notes , business records, confiscated federal bureau of investigation in 1992 , held throughout ensuing court proceedings. in 1997, suit settled in favor of maurice williams because land technically held in trust him united states government. therefore, although black hills institute had paid williams fossil, judged fossil considered land williams owned not legally sell without government permission. fossil returned williams ownership , pete larson, vice-president of black hills institute, sentenced 2 years in federal prison unrelated customs violation discovered fbi while searching through business records. williams offered sue auction sotheby s in new york, sold field museum of natural history in chicago usd 8.4 million – highest price ever paid fossil.


preparation of sue (fmnh pr2081) completed @ field museum , skeleton placed on exhibit on 17 may 2000. replica of sue on exhibit @ disney s animal kingdom in walt disney world


over 73% of skeleton recovered (according tyrannosaurus rex, tyrant king book)(some other sources, such black hills institute, claim on 80% complete), allowing first complete description of tyrannosaurus rex skeleton.


it has length of 12.3 meters (40 ft), stands 3.66 m (12 ft) tall @ hips, , according recent studies estimated have weighed between 8.4 14 metric tons when alive. in 1 of these studies, estimations hutchinson et al. (2011) point out figure of 14 metric tonnes being average estimate. authors have stated upper [18.5 metric tonnes] , lower [9.5 metric tonnes] estimates based on models wide error bars , consider [them] skinny, fat, or disproportionate . historically older estimations have produced figures low 5.7–6.4 metric tonnes specimen.


sue s impressive size may have been archived due prolonged ontogenic development, since oldest tyrannosaurus known big margin. age @ time of death estimated peter mackovicky , university of florida 28 years old, on 6–10 years older big tyrannosaurus specimens, mor 555, amnh 5027 or bhi 3033. (sue s age study description @ page 9 of sue s educator official guide field museum of natural history)








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