Results 1 to 10 of about 454 (147)

A new, ‘hip’ way to breathe [PDF]

open access: yeseLife, 2021
Ornithischians, one of the three major groups of dinosaurs, developed a unique mechanism to ensure airflow in the lungs.
Marc R Spencer
doaj   +2 more sources

Statistical evaluation of character support reveals the instability of higher-level dinosaur phylogeny [PDF]

open access: yesScientific Reports, 2023
The interrelationships of the three major dinosaur clades (Theropoda, Sauropodomorpha, and Ornithischia) have come under increased scrutiny following the recovery of conflicting phylogenies by a large new character matrix and its extensively modified ...
David Černý, Ashley L. Simonoff
doaj   +2 more sources

A new Heterodontosaurus specimen elucidates the unique ventilatory macroevolution of ornithischian dinosaurs [PDF]

open access: yeseLife, 2021
Ornithischian dinosaurs were ecologically prominent herbivores of the Mesozoic Era that achieved a global distribution by the onset of the Cretaceous. The ornithischian body plan is aberrant relative to other ornithodiran clades, and crucial details of ...
Viktor J Radermacher   +8 more
doaj   +2 more sources

Neuroanatomy of the late Cretaceous Thescelosaurus neglectus (Neornithischia: Thescelosauridae) reveals novel ecological specialisations within Dinosauria [PDF]

open access: yesScientific Reports, 2023
Ornithischian dinosaurs exhibited a diversity of ecologies, locomotory modes, and social structures, making them an ideal clade in which to study the evolution of neuroanatomy and behaviour. Here, we present a 3D digital reconstruction of the endocranial
David J. Button, Lindsay E. Zanno
doaj   +2 more sources

Phylogeny of basal iguanodonts (Dinosauria: Ornithischia): an update.

open access: yesPLoS ONE, 2012
The precise phylogenetic relationships of many non-hadrosaurid members of Iguanodontia, i.e., basal iguanodonts, have been unclear. Therefore, to investigate the global phylogeny of basal iguanodonts a comprehensive data matrix was assembled, including ...
Andrew T McDonald
doaj   +4 more sources

The anatomy and palaeobiology of the early armoured dinosaur Scutellosaurus lawleri (Ornithischia: Thyreophora) from the Kayenta Formation (Lower Jurassic) of Arizona

open access: yesRoyal Society Open Science, 2021
The armoured dinosaurs, Thyreophora, were a diverse clade of ornithischians known from the Early Jurassic to the end of the Cretaceous. During the Middle and Late Jurassic, the thyreophorans radiated to evolve large body size, quadrupedality, and complex
Benjamin T Breeden   +2 more
exaly   +3 more sources

A new phylogeny of Stegosauria (Dinosauria, Ornithischia) [PDF]

open access: yesPalaeontology, 2017
The stegosaurs are some of the most easily recognizable dinosaurs, but are surprisingly rare as fossils. Consequently much remains unknown about their palaeobiology, and every new stegosaurian find contributes to our understanding of the evolution of the clade.
Thomas J Raven, Susannah C R Maidment
exaly   +3 more sources

A new styracosternan hadrosauroid (Dinosauria: Ornithischia) from the Early Cretaceous of Portell, Spain. [PDF]

open access: yesPLoS ONE, 2021
A new styracosternan ornithopod genus and species is described based on the right dentary of a single specimen from the Mirambell Formation (Early Cretaceous, early Barremian) at the locality of Portell, (Castellón, Spain).
Andrés Santos-Cubedo   +3 more
doaj   +2 more sources

Tooth replacement in the early-diverging neornithischian Jeholosaurus shangyuanensis and implications for dental evolution and herbivorous adaptation in Ornithischia [PDF]

open access: yesBMC Ecology and Evolution
Background Tooth replacement patterns of early-diverging ornithischians, which are important for understanding the evolution of the highly specialized dental systems in hadrosaurid and ceratopsid dinosaurs, are poorly known.
Jinfeng Hu   +3 more
doaj   +2 more sources

Dietary palaeoecology of an Early Cretaceous armoured dinosaur (Ornithischia; Nodosauridae) based on floral analysis of stomach contents [PDF]

open access: yesRoyal Society Open Science, 2020
The exceptionally well-preserved holotype of the armoured dinosaur Borealopelta markmitchelli (Ornithischia; Nodosauridae) from the Early Cretaceous (Clearwater Formation) of northern Alberta preserves a distinct mass within the abdominal cavity ...
Caleb M. Brown   +6 more
doaj   +2 more sources

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