Results 81 to 90 of about 2,665 (231)

Insight on the anatomy, systematic relationships, and age of the Early Cretaceous ankylopollexian dinosaur Dakotadon lakotaensis [PDF]

PeerJ, 2015
Knowledge regarding the early evolution within the dinosaurian clade Ankylopollexia drastically increased over the past two decades, in part because of an increase in described taxa from the Early Cretaceous of North America. These advances motivated the
Clint A. Boyd, Darrin C. Pagnac
doaj   +2 more sources

How smart was T. rex? Testing claims of exceptional cognition in dinosaurs and the application of neuron count estimates in palaeontological research

The Anatomical Record, Volume 307, Issue 12, Page 3685-3716, December 2024.
Abstract Recent years have seen increasing scientific interest in whether neuron counts can act as correlates of diverse biological phenomena. Lately, Herculano‐Houzel (2023) argued that fossil endocasts and comparative neurological data from extant sauropsids allow to reconstruct telencephalic neuron counts in Mesozoic dinosaurs and pterosaurs, which ...
Kai R. Caspar, Cristián Gutiérrez‐Ibáñez, Ornella C. Bertrand, Thomas Carr, Jennifer A. D. Colbourne, Arthur Erb, Hady George, Thomas R. Holtz Jr, Darren Naish, Douglas R. Wylie, Grant R. Hurlburt   +10 more
wiley   +1 more source

A new semi‐fossorial thescelosaurine dinosaur from the Cenomanian‐age Mussentuchit Member of the Cedar Mountain Formation, Utah

The Anatomical Record, Volume 307, Issue 12, Page 3717-3781, December 2024.
Abstract Thescelosaurines are a group of early diverging, ornithischian dinosaurs notable for their conservative bauplans and mosaic of primitive features. Although abundant within the latest Cretaceous ecosystems of North America, their record is poor to absent in earlier assemblages, leaving a large gap in our understanding of their evolution ...
Haviv M. Avrahami, Peter J. Makovicky, Ryan T. Tucker, Lindsay E. Zanno   +3 more
wiley   +1 more source

The appendicular myology of Stegoceras validum (Ornithischia: Pachycephalosauridae) and implications for the head-butting hypothesis.

PLoS ONE, 2022
In this study, we use an exceptional skeleton of the pachycephalosaur Stegoceras validum (UALVP 2) to inform a comprehensive appendicular muscle reconstruction of the animal, with the goal of better understanding the functional morphology of the ...
Bryan R S Moore, Mathew J Roloson, Philip J Currie, Michael J Ryan, R Timothy Patterson, Jordan C Mallon   +5 more
doaj   +1 more source

Cautionary tales on the use of proxies to estimate body size and form of extinct animals

Ecology and Evolution, Volume 14, Issue 9, September 2024.
Reconstructing the body size and form of extinct animals is of vital importance to our understanding of macroevolution and palaeontology. This is often done using anatomical proxies where extinct species are known only from fragmentary remains. However, there are many limitations influencing the selection of proxy taxa that are frequently overlooked ...
Joel H. Gayford, Russell K. Engelman, Phillip C. Sternes, Wayne M. Itano, Mohamad Bazzi, Alberto Collareta, Rodolfo Salas‐Gismondi, Kenshu Shimada   +7 more
wiley   +1 more source

Standardizing fossil disparity metrics using sample coverage

Palaeontology, Volume 67, Issue 5, September/October 2024.
Abstract Estimating past biodiversity using the fossil record is a central goal of palaeobiology. Because raw estimates of biodiversity are biased by variation in sampling intensity across time, space, environments and taxonomic groups, sampling standardization is routinely applied when estimating taxonomic diversity (e.g. species richness).
Menna Jones, Roger Close
wiley   +1 more source

Digital reconstruction of the mandible of an adult Lesothosaurus diagnosticus with insight into the tooth replacement process and diet [PDF]

PeerJ, 2017
Fragmentary caudal ends of the left and right mandible assigned to Lesothosaurus diagnosticus, an early ornithischian, was recently discovered in the continental red bed succession of the upper Elliot Formation (Lower Jurassic) at Likhoele Mountain ...
Lara Sciscio, Fabien Knoll, Emese M. Bordy, Michiel O. de Kock, Ragna Redelstorff   +4 more
doaj   +2 more sources

First Valanginian Polacanthus foxii (Dinosauria, Ankylosauria) from England, from the Lower Cretaceous of Bexhill, Sussex [PDF]

, 2014
A new partial skeleton of the armoured ornithischian dinosaur Polacanthus found in the Wadhurst Clay Formation (Valanginian stage) of Bexhill, Sussex is the oldest recorded occurrence of this taxon.
Anon., Arbour, Arbour, Austen, Barrett, Blows, Blows, Blows, Blows, Blows, Britt, Burns, Carpenter, Coombs, Currie, Delair, Hulke, Hulke, Kerri Honeysett, Kilbourne, Kirkland, Kirkland, Kirkland, Lydekker, Mantell, Mantell, Naish, Norman, Norman, Norman, Norman, Osborn, Owen, Pereda-Suberbiola, Pereda-Suberbiola, Pereda-Suberbiola, Pereda-Suberbiola, Pereda-Suberbiola, Radley, Radley, Rasnitsyn, Rawson, Russell, Seeley, Seeley, Thomas, Vickaryous, Vickaryous, Watson, Wieland, William T. Blows   +50 more
core   +1 more source

Ornithischia Seeley 1887

, 2003
Ornithischia Seeley, 1887 Included taxa. Lesothosaurus, Technosaurus, Pisanosaurus, Thyreophora, Ornithopoda, and Marginocephalia, and all dinosaurs that are more closely related to these taxa than to saurischians. Temporal range. Camian-Maastrichtian. Distribution. Global. Diagnosis.
openaire   +1 more source

A new ornithopod (Dinosauria; Ornithischia) from Antarctica

Cretaceous Research, 2013
Fil: Coria, Rodolfo Anibal. Consejo Nacional de Investigaciones Cientificas y Tecnicas. Centro Cientifico Tecnologico Conicet - Patagonia Norte; Argentina.
Coria, Rodolfo Anibal, Moly, Juan J., Reguero, Marcelo Alfredo, Santillana, Sergio, Marenssi, Sergio Alfredo   +4 more
openaire   +2 more sources