Results 21 to 30 of about 556 (136)

A new Cretaceous thyreophoran from Patagonia supports a South American lineage of armoured dinosaurs. [PDF]

open access: yesSci Rep, 2022
The early evolution of thyreophoran dinosaurs is thought to have occurred primarily in northern continents since most evidence comes from the Lower and Middle Jurassic of Europe and North America.
Riguetti FJ   +2 more
europepmc   +5 more sources

New Ankylosaurian Cranial Remains From the Lower Cretaceous (Upper Albian) Toolebuc Formation of Queensland, Australia

open access: yesFrontiers in Earth Science, 2022
Australian dinosaur research has undergone a renaissance in the last 10 years, with growing knowledge of mid-Cretaceous assemblages revealing an endemic high-paleolatitude Gondwanan fauna.
Timothy G. Frauenfelder   +7 more
doaj   +1 more source

The dentary of hadrosauroid dinosaurs: evolution through heterochrony

open access: yesPalaeontology, Volume 66, Issue 5, September/October 2023., 2023
Abstract The near‐global distribution of hadrosaurid dinosaurs during the Cretaceous has been attributed to mastication, a behaviour commonly recognized as a mammalian adaptation. Its occurrence in a non‐mammalian lineage should be accompanied by the evolution of several morphological modifications associated with food acquisition and processing.
D. Fredrik K. Söderblom   +3 more
wiley   +1 more source

Relative skull size evolution in Mesozoic archosauromorphs: potential drivers and morphological uniqueness of erythrosuchid archosauriforms

open access: yesPalaeontology, Volume 65, Issue 3, May/June 2022., 2022
Abstract Little is known about the large‐scale evolutionary patterns of skull size relative to body size, and the possible drivers behind these patterns, in Archosauromorpha. For example, the large skulls of erythrosuchids, a group of non‐archosaurian archosauromorphs from the Early and Middle Triassic, and of theropod dinosaurs are regarded as ...
Jordan Bestwick   +8 more
wiley   +1 more source

A reassessment of the purported ankylosaurian dinosaur Bienosaurus lufengensis from the Lower Lufeng Formation of Yunnan, China [PDF]

open access: yesActa Palaeontologica Polonica, 2019
The earliest definitive ornithischian dinosaurs are from the Early Jurassic and are rare components of early dinosaur faunas. The Lower Lufeng Formation (Hettangian–Sinemurian) of Yunnan Province, China, has yielded a diverse Early Jurassic terrestrial ...
Thomas J. Raven   +3 more
doaj   +1 more source

Paleodiversity of Late Cretaceous Ankylosauria from Mexico and their phylogenetic significance [PDF]

open access: yesSwiss Journal of Palaeontology, 2018
Isolated bones and osteoderms of ankylosaurian dinosaurs recovered from Late Cretaceous sediments of northern Coahuila, northeastern Mexico, have been identified as remains of nodosaurids. Here, we summarize these discoveries and provide a review on Mexican Ankylosauria from a taxonomic perspective.
Héctor E. Rivera-Sylva   +5 more
openaire   +1 more source

Osteology and Taxonomy of British Wealden Supergroup (Berriasian–aptian) Ankylosaurs (Ornithischia, Ankylosauria)

open access: yesJournal of Vertebrate Paleontology, 2020
Ankylosaurs, dinosaurs possessing extensive body armor, were significant components of terrestrial ecosystems from the Middle Jurassic–latest Cretaceous. They diversified during the Early Cretaceous, becoming globally widespread. The Lower Cretaceous Wealden Supergroup (Berriasian–Aptian) of Britain has produced abundant ankylosaur material, with three
Thomas J. Raven   +3 more
openaire   +1 more source

Sympatry of two ankylosaurs (Hungarosaurus and cf. Struthiosaurus) in the Santonian of Hungary [PDF]

open access: yes, 2013
A complete and well-preserved right ankylosaurian humerus from the Upper Cretaceous (Santonian) Csehbánya Formation of Iharkút, western Hungary is described here.
Prondvai, Edina, Ősi, Attila
core   +3 more sources

A new small-bodied ankylosaurian dinosaur from the Upper Cretaceous of North Patagonia (Río Negro Province, Argentina) [PDF]

open access: yes, 2022
The most representative ankylosaurian remains from Argentina have been found in sediments of the Allen Formation (Campanian–Maastrichtian) in Salitral Moreno, Río Negro Province.
Apesteguía, Sebastián   +6 more
core   +2 more sources

New Insights into the Cranial Anatomy of Panoplosaurus mirus (Dinosauria: Nodosauridae) using Computed Tomography [PDF]

open access: yes, 2023
The holotype skull (CMN 2759) of the Late Cretaceous nodosaurid Panoplosaurus mirus Lambe 1919 is re-examined using computed tomography (CT) imaging, revealing important new information about the internal anatomy.
Livius, Marissa C. H.
core   +2 more sources

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