Tyrannosaurus rex Osborn, 1905

Skull from a Local Museum

Cast of Tooth of Stan

Remarks

• The tooth is a research quality cast of a from Stan.  You can see Stan at the Black Hills Institute of Geological Research where he is permanently on display.

• You can also see and learn more about him by visiting the BHIG Website

• We would like to thank Tony Fabian for allowing us to photograph the tooth.

• We must also give credit to Peter and Neal Larson, Ed Gerken, and to all involved in finding, excavating, prepping, and mounting Stan.

• Strat and Locale:  Montana Group, Hell Creek Formation, Harding County, SD.

• Check out the T. rex skull!

General Info

Synonyms (older names and misidentifications)

• 1892 ?Manospondylus gigas Cope
• 1905 Tyrannosaurus rex Osborn
• 1905 Dynamosaurus imperiosus Osborn
• 1964 Tyrannosaurus rex Osborn; Russell
• 1984 Tyrannosaurus rex Osborn; Lozinsky, Hunt, Wolberg, and Lucas
• 1987 cf. Tyrannosaurus rex Osborn; Russell
• 1990 cf. Tyrannosaurus rex Osborn; Weishampel, Dodson, and Osmólska
• 1990 Tyrannosaurus rex Osborn; Weishampel, Dodson, and Osmólska
• All of the reports up to 1990 can be found in Weishampel, Dodson, and Osmólska (see below)

Stratigraphic Occurrence

• Montana Group, Hell Creek Formation of Southeastern Montana
• Montana Group, Hell Creek Formation of Northwestern South Dakota
• Montana Group, Lance Formation of Southwestern Wyoming
• Montana Group, Laramie Formation of East-Central Colorado
• Montana Group, Livingston Formation of Eastern Montana
• Frenchman Formation of Southwestern Saskatchewan, Canada
• Scollard Formation of Southern Alberta, Canada
• Willow Creek Formation of Southern Alberta, Canada
• Tornillo Group, Javelina Formation of Trans-Pecos, Texas
• McRae Formation of Northwestern New Mexico

Age

• Tyrannosaurus rex Osborn lived during the latest Maastrichtian (~66-65 mya).

Geographic Occurrence (not an all-inclusive list)

• Alberta, Canada
• Saskatchewan, Canada
• Brewster County, TX
• Dawson County, MT
• Harding County, SD
• Sierra County, NM
• Sweetwater County, WY

Remarks

       For more information on T. rex and cousins, see:

• Carroll, R. L.  1988.  Vertebrate Paleontology and Evolution.  New York:  W. H. Freeman and Company.
• Lessem, D.; Glut, D. F.  1993.  Dinosaur Encyclopedia.  New York:  Random House.
• Weishampel, D. B.; Dodson, P.; Osmólska, H., eds.  1990.  The Dinosauria.  Berkeley:  University of California Press, several chapters.