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Daspletosaurus horneri

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Embryonic left dentary of cf. Daspletosaurus horneri. MOR 268 part in medial view (A), counterpart in lateral view (B), and interpretive illustrations of the same views (C and D, respectively). Hypothesized reconstruction of MOR 268 in life (E) based on comparison with other juvenile tyrannosaurid dentaries. Shaded areas are not preserved in MOR 268. All images are at the same scale. atmg, anterior termination of Meckelian groove; d5, tooth 5; d8, tooth 8; mg, Meckelian groove; omf, oral mandibular foramen. [Colour online.]

Embryonic left dentary of cf. Daspletosaurus horneri . MOR 268 part in med... Available to Purchase

Published: 25 January 2021
Fig. 5. Embryonic left dentary of cf. Daspletosaurus horneri . MOR 268 part in medial view (A), counterpart in lateral view (B), and interpretive illustrations of the same views (C and D, respectively). Hypothesized reconstruction of MOR 268 in life (E) based on comparison with other juvenile
Image
Comparison of juvenile tyrannosaurid dentaries from the Late Cretaceous of Western North America. TMP 1994.012.0155 (mirrored; Gorgosaurus libratus) in lateral (A) and medial (B) views; MOR 553 S 7-19-0-97 (Daspletosaurus horneri) in lateral (C) and medial (D) views; and TMP 1994.143.0001 (mirrored; Gorgosaurus libratus) in lateral (E) and medial (F) views, to the same scale. Note silhouette of hypothetical reconstruction of MOR 268, showing small size relative to other specimens. Synchrotron microscopic computed tomography reconstruction (G, H) of MOR 268 in lateral (G) and medial (H) views, enlarged 10× for morphological comparison with other specimens. dfor, dorsal row of foramina; mfor, intermediate row of foramina; mg, Meckelian groove; sfor, slit-like foramen; tp, transition point between anterior and ventral edges of dentary. [Colour online.]

Comparison of juvenile tyrannosaurid dentaries from the Late Cretaceous of ... Available to Purchase

Published: 25 January 2021
Fig. 8. Comparison of juvenile tyrannosaurid dentaries from the Late Cretaceous of Western North America. TMP 1994.012.0155 (mirrored; Gorgosaurus libratus ) in lateral (A) and medial (B) views; MOR 553 S 7-19-0-97 ( Daspletosaurus horneri ) in lateral (C) and medial (D) views; and TMP
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Stratigraphy of dinosaur occurrences, including nesting horizons (N1–N5) in the Two Medicine Formation (all major field areas, composite reference section from type area), in relation to new U-Pb geochronology, new formal members, and major regressive-transgressive cycles of the Western Interior Seaway. The five bentonite ages marked in red are from the Two Medicine Formation type area, and these ages were incorporated in the age model. The bentonite age marked in black (EMC080216-1) is from the Willow Creek anticline field area (see Table 1). Modeled ages for basal and top contacts of the Two Medicine Formation have large errors and are reported in light gray text to distinguish them from more reliable age interpretations. Best approximations of first occurrences are indicated for 25 dinosaur taxa. Occurrences that lack detailed locality data are indicated by light gray shading (occurrences 15, 16, and 21), and their stratigraphic placement is more speculative. Dinosaur taxa figured (skulls not to scale) include (1) Acristavus gagslarsoni (holotype); (2) Daspletosaurus sp.; (3) Cerasinops hodgskissi (holotype); (4) Gryposaurus latidens (holotype); (5) Gryposaurus sp.; (6) Maiasaura peeblesorum; (7) pachycephalosaurid indet. #1; (8) dromaeosaurid indet. #1; (9) troodontid indet.; (10) Orodromeus makelai (holotype); (11) dromaeosaurid indet. #2; (12) Daspletosaurus horneri (holotype); (13) Troodon formosus; (14) Bambiraptor feinbergi; (15) Palaeoscincus rugosidens (holotype, potential junior synonym of Edmontonia rugosidens, Russell, 1940); (16) Styracosaurus ovatus (holotype); (17) Oohkotokia horneri (holotype, potential junior synonym of Euoplocephalus tutus , Arbour and Currie, 2013); (18) Stellasaurus ancellae (holotype); (19) Hypacrosaurus stebingeri (holotype); (20) Brachyceratops montanensis (holotype); (21) Prenoceratops pieganensis (holotype); (22) Prosaurolophus blackfeetensis (holotype, potential junior synonym of Prosaurolophus maximus , McGarrity et al., 2013); (23) Einiosaurus procurvicornis (holotype); (24) pachycephalosaurid indet. #2; (25) Achelousaurus horneri (holotype). Nesting horizons include (NH1) TM-160, lower nesting horizon, cf. Maiasaura peeblesorum (Willow Creek anticline field area); (NH2) TM-006, troodontid nesting horizons (Willow Creek anticline field area); (NH3) TM-008, hadrosaurine nesting horizon (Willow Creek anticline field area); (NH4) TM-035, TM-037, lambeosaurid nesting horizon (Landslide Butte field area); and (NH5) TM-066, Hypacrosaurus nesting horizon (Blacktail Creek site, close proximity to Two Medicine type area). See Figure 4 for key to colors and patterns in stratigraphic column. TM—Museum of the Rockies field locality numbers, Montana State University, Bozeman, Montana, USA; R7—Telegraph Creek–Eagle regression; T8—Claggett transgression; R8—Claggett regression; T9—Bearpaw transgression.

Stratigraphy of dinosaur occurrences, including nesting horizons (N1–N5) in... Available to Purchase

Published: 17 July 2024
) Gryposaurus sp.; (6) Maiasaura peeblesorum ; (7) pachycephalosaurid indet. #1; (8) dromaeosaurid indet. #1; (9) troodontid indet.; (10) Orodromeus makelai (holotype); (11) dromaeosaurid indet. #2; (12) Daspletosaurus horneri (holotype); (13) Troodon formosus ; (14) Bambiraptor feinbergi ; (15
Journal Article

Baby tyrannosaurid bones and teeth from the Late Cretaceous of western North America 1 Available to Purchase

Gregory F. Funston, Mark J. Powers, S. Amber Whitebone, Stephen L. Brusatte, John B. Scannella, John R. Horner, Philip J. Currie
Published: 25 January 2021
Canadian Journal of Earth Sciences (2021) 58 (9): 756–777.
DOI: https://doi.org/10.1139/cjes-2020-0169
...Fig. 5. Embryonic left dentary of cf. Daspletosaurus horneri . MOR 268 part in medial view (A), counterpart in lateral view (B), and interpretive illustrations of the same views (C and D, respectively). Hypothesized reconstruction of MOR 268 in life (E) based on comparison with other juvenile...
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Immature Daspletosaurus sp. specimens from the Dinosaur Park Formation provide insight into ontogenetically invariant tyrannosaurid cranial morphology Available to Purchase

Colton C. Coppock, Mark J. Powers, Jared T. Voris, Henry S. Sharpe, Philip J. Currie
Published: 11 September 2024
Canadian Journal of Earth Sciences (2024) 61 (12): 1227–1239.
DOI: https://doi.org/10.1139/cjes-2024-0083
... Daspletosaurus spp . comparative specimens include the Daspletosaurus horneri Carr et al., 2017 holotype (MOR 590), the Daspletosaurus wilsoni Warshaw & Fowler, 2022 holotype (BDM 107), a DPFm Daspletosaurus specimen (TMP 1985.062.0001), and material referred to the Daspletosaurus hypodigm...
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Updating the Upper Cretaceous (Campanian) Two Medicine Formation of Montana: Lithostratigraphic revisions, new CA-ID-TIMS U-Pb ages, and a calibrated framework for dinosaur occurrences Available to Purchase

Raymond R. Rogers, John R. Horner, Jahandar Ramezani, Eric M. Roberts, David J. Varricchio
Journal: GSA Bulletin
Published: 17 July 2024
GSA Bulletin (2025) 137 (1-2): 315–340.
DOI: https://doi.org/10.1130/B37498.1
...) Gryposaurus sp.; (6) Maiasaura peeblesorum ; (7) pachycephalosaurid indet. #1; (8) dromaeosaurid indet. #1; (9) troodontid indet.; (10) Orodromeus makelai (holotype); (11) dromaeosaurid indet. #2; (12) Daspletosaurus horneri (holotype); (13) Troodon formosus ; (14) Bambiraptor feinbergi ; (15...
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View PDF for article title, Updating the Upper Cretaceous (Campanian) Two Medicine Formation of Montana: Lithostratigraphic revisions, new CA-ID-TIMS U-Pb ages, and a calibrated framework for dinosaur occurrences
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Journal Article

Two braincases of Daspletosaurus (Theropoda: Tyrannosauridae): anatomy and comparison 1 Available to Purchase

Ariana Paulina Carabajal, Philip J. Currie, Thomas W. Dudgeon, Hans C.E. Larsson, Tetsuto Miyashita
Published: 19 August 2021
Canadian Journal of Earth Sciences (2021) 58 (9): 885–910.
DOI: https://doi.org/10.1139/cjes-2020-0185
..., Daspletosaurus horneri ( Horner et al. 1992 ; Currie et al. 2005 ; Carr et al. 2017 ). Although undescribed at the time, the subsequent decades brought two more genera of Campanian tyrannosaurines from Utah: Lythronax argestes (Wahweap Formation) ( Loewen et al. 2013 ) and Teratophoneus curriei...
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View PDF for article title, Two braincases of <span class="search-highlight">Daspletosaurus</span> (Theropoda: Tyrannosauridae): anatomy and comparison 1
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