Results 51 to 60 of about 424 (121)

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

open access: yesPLoS 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   +5 more
doaj   +1 more source

Intraskeletal histovariability and skeletochronology in an ornithopod dinosaur from the Maestrazgo Basin (Teruel, Spain)

open access: yesJournal of Anatomy, Volume 247, Issue 3-4, Page 643-664, September/October 2025.
Abstract Ornithopods are an extinct group of dinosaurs that were particularly abundant and diverse in the Cretaceous of the Iberian Peninsula, and whose abundance in the Maestrazgo Basin has allowed numerous taxa to be identified over the last decade. Many of these fossil remains are still taxonomically indeterminate and require a more detailed study ...
Juan Maíllo   +4 more
wiley   +1 more source

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

open access: yesPeerJ, 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   +4 more
doaj   +2 more sources

Commentary: Additional observations on the skeleton of a juvenile Gryposaurus notabilis (Ornithischia: Hadrosauridae)

open access: yes
The Anatomical Record, EarlyView.
Jordan C. Mallon   +3 more
wiley   +1 more source

Skull morphology and histology indicate the presence of an unexpected buccal soft tissue structure in dinosaurs

open access: yesJournal of Anatomy, Volume 247, Issue 3-4, Page 790-818, September/October 2025.
A combined approach of osteology and histology was used to examine the cheek regions of dinosaurs. Strong evidence was found for a soft tissue in this region connecting the zygoma to the mandible, here named the ‘exoparia’. Abstract Unlike mammals, reptiles typically lack large muscles and ligaments that connect the zygoma to the mandible.
Henry S. Sharpe   +7 more
wiley   +1 more source

The origins of neural spine elongation in iguanodontian dinosaurs and the osteology of a new sail‐back styracosternan (Dinosauria, Ornithischia) from the Lower Cretaceous Wealden Group of England

open access: yesPapers in Palaeontology, Volume 11, Issue 4, July/August 2025.
Abstract The Wealden Group of southern England was deposited during the late Berriasian to early Aptian interval. It records a critical time in the development of iguanodontian dinosaur diversity, which increased from low levels during the Jurassic to higher levels in the Aptian and Albian. A new iguanodontian dinosaur, Istiorachis macarthurae gen.
Jeremy A. F. Lockwood   +2 more
wiley   +1 more source

Late Cretaceous nodosaurids (Ankylosauria: Ornithischia) from Mexico

open access: yesRevista Mexicana de Ciencias Geológicas, 2014
Restos de anquilosaurios nodosáuridos del Cretácico Superior de México son descritos aquí. Las muestras proceden de la Formación El Gallo de Baja California, de las formaciones Pen y Aguja del noroeste de Coahuila, y de la Formación Cerro del Pueblo ...
Héctor E. Rivera-Sylva   +2 more
doaj  

Body size distribution of the dinosaurs. [PDF]

open access: yesPLoS ONE, 2012
The distribution of species body size is critically important for determining resource use within a group or clade. It is widely known that non-avian dinosaurs were the largest creatures to roam the Earth.
Eoin J O'Gorman, David W E Hone
doaj   +1 more source

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

open access: yesThe 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   +10 more
wiley   +1 more source

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

open access: yesThe 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   +3 more
wiley   +1 more source

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