Results 91 to 100 of about 1,708,794 (291)

A Ceratopsian Dinosaur from the Lower Cretaceous of Western North America, and the Biogeography of Neoceratopsia.

PLoS ONE, 2014
The fossil record for neoceratopsian (horned) dinosaurs in the Lower Cretaceous of North America primarily comprises isolated teeth and postcrania of limited taxonomic resolution, hampering previous efforts to reconstruct the early evolution of this ...
Andrew A Farke, W Desmond Maxwell, Richard L Cifelli, Mathew J Wedel   +3 more
doaj   +1 more source

Protolith age of the Altar and Carnero complexes and latest Cretaceous–Miocene deformation in the Caborca–Altar region of northwestern Sonora, Mexico

Revista Mexicana de Ciencias Geológicas, 2019
In the Caborca–Altar area of northwest Sonora, variably deformed and metamorphosed sedimentary and volcanic rocks crop out in a northwest-southeast–trending belt (El Batamote belt) at least 70 km long.
Carl E. Jacobson, César Jacques-Ayala, Andrew P. Barth, Juan Carlos García y Barragán, Jane N. Pedrick, Joseph L. Wooden   +5 more
doaj   +1 more source

Burmese amber fossils bridge the gap in the Cretaceous record of polypod ferns [PDF]

, 2016
publisher: Elsevier articletitle: Burmese amber fossils bridge the gap in the Cretaceous record of polypod ferns journaltitle: Perspectives in Plant Ecology, Evolution and Systematics articlelink: http://dx.doi.org/10.1016/j.ppees.2016.01.003 ...
Heinrichs, Jochen, Schmidt, AR, Heinrichs, J, Schneider, Harald, Schmidt, Alexander R.   +4 more
core   +1 more source

Elliptic Fourier analysis as a tool for the taxonomic identification of isolated theropod pedal phalanges

The Anatomical Record, EarlyView.
Abstract Studies of Upper Cretaceous deposits in North America have provided invaluable insights into the continental ecosystems of this time. Theropod (Saurischia, Dinosauria) pedal phalanges are commonplace in these deposits but can be difficult to identify at a finer taxonomic resolution.
Trystan M. Warnock‐Juteau, Stephanie M. Smith, Thomas M. Cullen   +2 more
wiley   +1 more source

BIOGEOGRAPHIC HISTORIES AND CHRONOLOGIES OF DERIVED IGUANODONTIANS

Publicación Electrónica de la Asociación Paleontológica Argentina, 2015
The geographic distributions, chronology, and phylogenetic relationships of derived iguanodontians describe a biogeographic history of active intercontinental dispersal, which is tested via comparison with eustatic sea level fluctuations.
Jason J. Head, Yoshitsugu Kobayashi
doaj  

Magnetobiostratigraphic synthesis of Leg 123: sites 765 and 766 (Argo Abyssal Plain and Lower Exmouth Plateau) [PDF]

, 1992
During ODP Leg 123, Sites 765 and 766 were drilled to examine the tectonic evolution, sedimentary history, and paleoceanography of the Argo Abyssal Plain and lower Exmouth Plateau.
Moran, M.J., Ogg, J. G., Bown, P.R., Haig, D.W., M.J. Moran, Baumgartner, P. O., Moran, M. J., J. Mutterlose, P.O. Baumgartner, J.G. Ogg, Bown, P. R., M.A. Kaminski, Kaminski, M.A., P.R. Bown, D.W. Haig, Haig, D. W., Kaminski, Michael A., Baumgartner, P.O., Mutterlose, J., McMinn, A., Ogg, J.G., A. McMinn   +21 more
core   +1 more source

Drivers of tail evolution in squamates and their implications for the fossorial origin of snakes

The Anatomical Record, EarlyView.
Abstract The axial skeleton serves as the primary structural support in all vertebrates and is subdivided into five distinct regions: cervical, thoracic, lumbar, sacral, and caudal. Relaxation of constraints acting on the terminal end of the axial skeleton has led to remarkable variation in caudal vertebrae number across Squamata.
Olivia Binfield, Marco Camaiti, Lucy Roberts   +2 more
wiley   +1 more source

First Late Cretaceous ichthyofauna from the Kababish Formation and its paleoenvironmental significance and paleogeographic implications [PDF]

Fossil Record
This study documents the first record of a fossil fish assemblage from the Upper Cretaceous Kababish Formation of north-central Sudan, associated with the dyrosaurid crocodyliform Brachiosuchus kababishensis.
Khalafallah Salih, David C. Evans, Robert Bussert, Nicole Klein, Mutwakil Nafi, Johannes Müller   +5 more
doaj   +3 more sources

Late Cretaceous Vertebrates from the Western Interior

, 2006
Late Cretaceous; Cretaceous; vertebrates; Western ...
Spencer G. Lucas and Robert M. Sullivan, eds.
core  

Working with laws, regularities and singularities in biology: The evolution of mammalian red blood cell size as a case study

The Anatomical Record, EarlyView.
Abstract Phylogenetic comparative methods have been used in recent literature to work with laws and test for regularities (evolutionary associations of quantitative features) and evolutionary singularities (features that evolved in a single taxon). We analyzed these uses epistemologically, taking the evolution of red‐blood‐cell mean corpuscular volume (
Jorge Cubo, Paul Aubier, Cassandra Cheyron, Isabelle Drouet   +3 more
wiley   +1 more source