Locality: Donald Zimmershied Ranch, near the Jump-off, Harding County, South Dakota.
Horizon: Hell Creek Formation.
Biostratigraphy:
Age: Lancian age, upper Maastrichtian Stage, uppermost Senonian subepoch, Upper Gulf Epoch, Late Cretaceous.
Material:
Samson (Z-rex, Mr. Z., Mr. Zed): Nearly complete skull, 9 cervical and 7 dorsal vertebrae, 2 cervical and 10 dorsal ribs, 17 caudals, at least 4 chevrons, both femora, left fibula, abundant tibia pieces, 3 metatarsals, and 20 pes phalanges.


Locality: A housing development, Littleton, Colorado.
Horizon: Lower part of the Denver Formation.
Biostratigraphy:
Age: Lancian age, upper Maastrichtian Stage, uppermost Senonian subepoch, Upper Gulf Epoch, Late Cretaceous.
Material:
DMNH 2827: Left femur, iilum, scapula, coracoid, right tibia, fibula, astragalus, distal cuadal vertebrae, ribs and 3 teeth of a subadult.
Locality: Near Rhame, Bowman County, North Dakota.
Horizon: Hell Creek Formation.
Biostratigraphy:
Age: Lancian age, upper Maastrichtian Stage, uppermost Senonian subepoch, Upper Gulf Epoch, Late Cretaceous.
Material:
Pioneer Trials Museum, Bowman, North Dakota: Ribs, vertebrae, the distal end of the scapula and gastralia.
Locality: Jon, Betty, and David Niemi Ranch, near Buffalo, Harding County, South Dakota.
Note: About 1 quarter mile from the Stan excavation site.
Horizon: Hell Creek Formation, about 16 m beneath the K-T boundary.
Biostratigraphy:
Age: Lancian age, upper Maastrichtian Stage, uppermost Senonian subepoch, Upper Gulf Epoch, Late Cretaceous.
Material:
BHI 4100 (Duffy): Both maxillae, right premaxilla, nasals, both lacrimals, left postorbital, both quadrates, both jugals, left squamosal, both quadratojugals, left pterygoid, both palatines, left ectopterygoid, right epipterygoid, both dentaries, right surangular, right prearticular, right splenial, right coronoid, a partial braincase, 49 loose rooted teeth, both scapulae, both coracoids, 1 astragalus, right ischium, 8 caudals, 13 dorsals, cervical vertebrae, 9 dorsal ribs and 6 cheverons.
Note: About 50 loose teeth were found along with the specimen.
Locality: Jon, Betty, and David Niemi Ranch, near Buffalo, Harding County, South Dakota.
Note: About a quarter mile south of the Duffy excavation site.
Horizon: Hell Creek Formation, about 16 m beneath the K-T boundary.
Biostratigraphy:
Age: Lancian age, upper Maastrichtian Stage, uppermost Senonian subepoch, Upper Gulf Epoch, Late Cretaceous.
Material:
BHI 6249 (STEVEN): Right femur, 6 dorsal vertebrae (mostly incomplete), 5 doral ribs, 1 phalange and 2 incomplete skull bones.
Note: Some bones havee been bitten and chewed.
Note: Some eggshells found with skeleton, but it isn*t know if they are tyrannosaurid or from another dinosaur.
Locality: Near Ekalaka, Carter County, Montana.
Horizon: Hell Creek Formation.
Biostratigraphy:
Age: Lancian age, upper Maastrichtian Stage, uppermost Senonian subepoch, Upper Gulf Epoch, Late Cretaceous.
Material:
UWGM 181: Left and right dentary, right surangular, splenial, right maxilla, left postorbital, right postorbital, right frontal (with attached prefrontal, parietal, and laterosphenoid), right jugal, rigth quadratojugal, right quadrate, and tentatively, partial pterygoid, squamosal, prearticular and 3 vertebrae.
Number: Not given (OTTO): Both femora, both tibia, 2 metatarsals, 1 figula, multiple cervical and dorsal ribs, and multiple caudal vertebrae.
Locality: Near Marmouth, Slpe County, North Dakota.
Horizon: Hell Creek Formation.
Biostratigraphy:
Age: Lancian age, upper Maastrichtian Stage, uppermost Senonian subepoch, Upper Gulf Epoch, Late Cretaceous.
Material:
BHI 6219 (007, Double-O-Seven): Both maxillae, both premaxillae, parts of the dentary, 1 vertebrae, 1 dorsal rib, 1 metatarsal, 1 pes phalange, the distal end of the left humerus, parts of a tibia and fibula.
Locality: Near the headwaters of Seven Mile Creek, north of the Cheyenne River, Niobrara County, Wyoming.
Horizon: Lance Formation.
Biostratigraphy:
Age: Lancian age, upper Maastrichtian Stage, uppermost Senonian subepoch, Upper Gulf Epoch, Late Cretaceous.
Material:
Number: Not given: (depository unknown) (Barnum): Both maxillae, left jugal, left ectopterygoid, right squamosal, left dentary, surangular, articular, 1 cervical, 4 dorsals, 2 caudal vertebrae, 9 dorsal ribs, some gastralia, 6 metatarsals, 3 pes phalanges, left ilium, left ischium, left pubis, incomplete right pubis, left femur, incomplete right femur, left tibia, left fibula, astragalus, calcaneum, partial left scapula, left humerus and manus claw.
Locality: Land belonging to Harding County, located within the pasture of Lloyd, Eunice, and Russell Fox, near Redig, Short Pine Hills, Harding County, South Dakota.
Horizon: Hell Creek Formation.
Biostratigraphy:
Age: Lancian age, upper Maastrichtian Stage, uppermost Senonian subepoch, Upper Gulf Epoch, Late Cretaceous.
Material:
BHI 4182 (Fox, Foxy Lady, County rex): Left postorbital, right quadratojugal, right ectopterygoid, both dentaries, both surangulars, both articulars, both prearticulars, both angulars, both splenials, both coronodis, 43 loose rooted teeth, 2 cervical, 1 dorsal, 3 caudal vertebrae, 5 dorsal ribs, and 2 cervical ribs.
Locality: Harding County, South Dakota.
Horizon: Hell Creek Formation.
Biostratigraphy:
Age: Lancian age, upper Maastrichtian Stage, uppermost Senonian subepoch, Upper Gulf Epoch, Late Cretaceous.
Material:
Tinker (no depository): Both premaxillae, left maxillae, both quadratojugals, right palaitne, left jugal, qudrate, squamosal, pterygoid, a parietal, part of 1 nasal, left dentary, both articulars, both coronoids, right surangular, left prearticular, angular, splenial, 20 partial caudal vertebrae, 12 chevrons, 5 dorsal and 2 cervical ribs, numerous rib fragments, both pubes, both ilia incomplete, left ischia, parts of both scapula, right coracoid, right humerus, incomplete left humeurs, manus and pes claws of a juvenile.
Locality: Southeast of Ekalaka, Carter County, Montana.
Horizon: Hell Creek Formation.
Biostratigraphy:
Age: Lancian age, upper Maastrichtian Stage, uppermost Senonian subepoch, Upper Gulf Epoch, Late Cretaceous.
Material:
Ollie (Rex A): Left maxillae, both premaxilae, both postorbitals, both quadrates, left jugal, both pterygoids, a partial braincase, both femora, both tibia, both fibulae, both astragalia and calcanea, 2 metatarsals, several phalanges, 1 ischia, the left pubis, right ilium, right scapula, both humeri, right radius, right ulna, several cervical vertebrae, multiple dorsal and caudal vertebrae, many cervical and dorsal ribs, and several cheverons.
Locality: Northeast of Isabel, Corson County, South Dakota.
Horizon: Hell Creek Formation.
Biostratigraphy:
Age: Lancian age, upper Maastrichtian Stage, uppermost Senonian subepoch, Upper Gulf Epoch, Late Cretaceous.
Material:
Rex B (Triceratops-Alley T. rex): Left maxilla, left premaxilla, left quadrate, left quadratojugal, both lacrimals, nasals, left ectopterygoid, braincase with disarticulated nonfused frontals, right scapula, right coracoid, 1 rib, several numerous fragmented bones, and several unprepared skull bones.
Rex C: Right maxilla, right premaxilla, right surangular, right articular, right splenial, right (?) tibia, right astragalus (calcaneum?), both fibulae, 2 pes phalanges, right ischia, 1 cervical, 2 dorsal, 2 caudal vertebrae, 1 cheveron, and several bones of unidentified parts.
Locality: Wade Derflinger Ranch, ner Usta, Perkins County, South Dakota.
Horizon: Lower Hell Creek Formation.
Biostratigraphy:
Age: Lancian age, upper Maastrichtian Stage, uppermost Senonian subepoch, Upper Gulf Epoch, Late Cretaceous.
Material:
BHI 6248 (E.E. Cope): Maxilla, dentary, ectopterygoid, angular, other undetermined skull bones, some vertebrae ribs, and concretion-encased bones.
Note: Much of the specimen is still unprepared.
Locality: Northern Niobrara County, Wyoming.
Horizon: Lance Formation.
Biostratigraphy:
Age: Lancian age, upper Maastrichtian Stage, uppermost Senonian subepoch, Upper Gulf Epoch, Late Cretaceous.
Material:
Number: Not given:(Monty): Braincase, nasals, right maxilla, lacrimal, postorbital, quadratojugal, squamosal, both quadrates, both pterygoids, left premaxilla, jugal, surangular, 4 cervical, 2 dorsal, 3 caudal vertebrae, 12 dorsal ribs, 4 gastralia, pubis, partial ilium, 1 pes phalange, ulna? and several bones still in jackets.
Locality: South of the Fort Peck Lake, Garfield County, Montana.
Horizon: Base of the Hell Creek Formation.
Biostratigraphy:
Age: Lancian age, lower Maastrichtian Stage, uppermost Senonian subepoch, Upper Gulf Epoch, Late Cretaceous.
Material:
MOR 1126 (C-rex): Left prearticular, surangular, 20 dorsal ribs of varying completeness, 2 partial dorsal vertebrae and a cheveron. Note: Has toothmarks on skeleton (LONGRICH, HORNER, ERICKSON & CURRIE, 2010)