Results 31 to 40 of about 370 (122)

A large hadrosaurid dinosaur from Presa San Antonio, Cerro del Pueblo Formation, Coahuila, Mexico [PDF]

Acta Palaeontologica Polonica, 2021
New hadrosaurid postcranial material is reported, collected near Presa San Antonio, Parras de la Fuente municipality, Coahuila, Mexico, in a sedimentary sequence belonging to the upper Campanian of the Cerro del Pueblo Formation, in the Parras Basin. The
Rogelio Antonio Reyna-Hernández, Héctor E. Rivera-Sylva, Luis E. Silva-Martínez, José Rubén Guzman-Gutiérrez   +3 more
doaj   +1 more source

New Geochronological Age Constraint and Chemostratigraphy for Aptian Lacustrine Strata, Cedar Mountain Formation, Utah

Geochemistry, Geophysics, Geosystems, Volume 24, Issue 9, September 2023., 2023
Abstract The Early Cretaceous is an important time of transition in Earth history, marked by a succession of oceanic anoxic events and carbon cycle perturbations that drove changes on land and in the ocean. The need for more precise geochronologic constraints in terrestrial sediments of Early Cretaceous age that record faunal and floral transitions is ...
Marina B. Suarez, Aisha Al Suwaidi, Elizabeth H. Montgomery, James I. Kirkland, Joe Andrew, Noah Mclean, Andreas Möller, Gregory Ludvigson, Celina A. Suarez   +8 more
wiley   +1 more source

Bentonite geochronology and tephrostratigraphy for litho- and chronostratigraphic refinement of fossiliferous Campanian strata in western North America [PDF]

, 2022
Tegan Beveridge studied weathered volcanic ash horizons within Late Cretaceous rocks in western North America. New high-precision ages and geochemical data facilitated correlation of richly fossiliferous rock units across the continent.
Beveridge, Tegan Louise
core   +1 more source

A baenid turtle shell from the Mesaverde Formation (Campanian, Late Cretaceous) of Park County, Wyoming, USA

Peer Community Journal, 2023
The Mesaverde Formation of the Wind River and Bighorn basins of Wyoming preserves a rich yet relatively unstudied terrestrial and marine faunal assemblage dating to the Campanian.
Wu, Ka Yan, Heuck, Jared, Varriale, Frank J., Farke, Andrew   +3 more
doaj   +1 more source

A Problematic Tyrannosaurid (Dinosauria: Theropoda) Skeleton and Its Implications for Tyrannosaurid Diversity in the Horseshoe Canyon Formation (Upper Cretaceous) of Alberta

The Anatomical Record, Volume 303, Issue 4, Page 673-690, April 2020., 2020
ABSTRACT Several published censuses have noted the presence of two tyrannosaurids, Daspletosaurus sp. and Albertosaurus sarcophagus, within the Upper Cretaceous Horseshoe Canyon Formation of Alberta. Although A. sarcophagus is known from more than a dozen major discoveries in these strata, Daspletosaurus sp.
Jordan C. Mallon, Jonathan R. Bura, Dirk Schumann, Philip J. Currie   +3 more
wiley   +1 more source

Dinosaur biogeographic structure and Mesozoic continental fragmentation: a network-based approach [PDF]

, 2016
Aim: To reconstruct dinosaur macro-biogeographical patterns through the Mesozoic Era using a network-based approach. We test how continental fragmentation affected dinosaur macro-biogeographical structure and evolutionary rates.
Ali, Amiot, Barrett, Bates, Benjamini, Benson, Benson, Benton, Boyland, Brusatte, Butler, Butts, Butts, Carrano, Croft, Csardi, Cumming, Dunhill, Ezcurra, Ezcurra, Ezcurra, Foote, Foote, Foote, Freeman, Gheerbrant, Gradstein, Haq, Holtz, Huber, Kones, Lloyd, Longrich, Longrich, Lull, Mannion, Mannion, Mannion, Miller, Moalic, Newman, Newman, Nieminen, Nopcsa, Opsahl, R Core Team, Rowe, Rutz, Sereno, Sereno, Sidor, Sidor, Smith, Smith, Starrfelt, Stubbs, Tschopp, Turner, Upchurch, Upchurch, Upchurch, Upchurch, Veevers, Venables, Vilhena, Vilhena, Wang, Whiteside, Whiteside, Xu   +69 more
core   +1 more source

Cranial anatomy and stratigraphy of a new specimen of the tyrannosaurine dinosaur Daspletosaurus from the Judith River Formation of Central Montana, USA [PDF]

Acta Palaeontologica Polonica
The tyrannosaurine Daspletosaurus contains three recognized species from the Campanian of Montana and Alberta: Daspletosaurus torosus, Daspletosaurus wilsoni, and Daspletosaurus horneri. The recently named D. wilsoni has been proposed to represent a
ETHAN WARNER-COWGILL, GLENN W. STORRS, RAYMOND R. ROGERS, ANTHONY E. MALTESE   +3 more
doaj   +1 more source

A Review of the fossil record of turtles of the clade Baenidae [PDF]

, 2016
The fossil record of the turtle clade Baenidae ranges from the Early Cretaceous (Aptian—Albian) to the Eocene. The group is present throughout North America during the Early Cretaceous, but is restricted to the western portions of the continents in the ...
Archibald J.D., Baur G., Blob R.W., Breithaupt B.H., Brinkman D., Brinkman D.B., Brinkman D.B., Case E.C., Cope E.D., Cope E.D., Cope E.D., Cope E.D., Cope E.D., Cope E.D., Dollo M.L., Estes R., Fiorillo A.R., Gaffney E.S., Gaffney E.S., Gaffney E.S., Gaffney E.S., Gaffney E.S., Gaffney E.S., Gaffney E.S., Gaffney E.S., Gilmore C.W., Gilmore C.W., Gilmore C.W., Gray J.E., Hay O.P., Hay O.P., Hay O.P., Hirayama R., Holroyd P.A., Holroyd P.A., Hutchison J.H., Hutchison J.H., Joyce W.G., Joyce W.G., Joyce W.G., Joyce W.G., Joyce W.G., Joyce W.G., Karl H.V., Kranz P.M., Lambe L.M., Lambe L.M., Lambe L.M., Lambe L.M., Leidy J., Leidy J., Leidy J., Leidy J., Leidy J., Leidy J., Lichtig A.J., Lillegraven J.A., Lipka T.R., Lucas S.G., Lucas S.G., Lyson T.R, Lyson T.R., Lyson T.R., Lyson T.R., Lyson T.R., Owen R., Parks W.A., Rabi M., Riabinin A.N., Rice D.D., Russell L., Stanton T.W., Storer J.E., Sullivan R.M., Tyler R. Lyson, Walter G. Joyce, Weems R.E., Weems R.E., Williams E.E., Wiman C.   +79 more
core   +1 more source

Feeding height stratification among the herbivorous dinosaurs from the Dinosaur Park Formation (upper Campanian) of Alberta, Canada. [PDF]

BMC Ecol, 2013
Mallon JC, Evans DC, Ryan MJ, Anderson JS.   +3 more
europepmc   +2 more sources

Skull ecomorphology of megaherbivorous dinosaurs from the dinosaur park formation (upper campanian) of Alberta, Canada. [PDF]

PLoS ONE, 2013
Megaherbivorous dinosaur coexistence on the Late Cretaceous island continent of Laramidia has long puzzled researchers, owing to the mystery of how so many large herbivores (6-8 sympatric species, in many instances) could coexist on such a small (4-7 ...
Jordan C Mallon, Jason S Anderson
doaj   +1 more source