Results 21 to 30 of about 2,587 (228)
Reavaliação da Suposta Ocorrência de Ornithischia na Formação Santana (Cretáceo Inferior), Bacia do Araripe, Nordeste, Brasil. [PDF]
Anuário do Instituto de Geociências, 2007 Em 1981, Giuseppe Leonardi e GuidoBorgomanero reportaram a primeira evidênciaosteológica da presença de dinossauros na Baciado Araripe. Estes pesquisadores identificaram umosso isolado como sendo um possível ísquio deOrnithischia, na época o primeiro ...
Elaine Batista Machado +1 more
doaj +3 more sources
Males resemble females. re-evaluating sexual dimorphism in protoceratops andrewsi (neoceratopsia, protoceratopsidae) [PDF]
, 2015 BACKGROUND: Protoceratops andrewsi (Neoceratopsia, Protoceratopsidae) is a well-known dinosaur from the Upper Cretaceous of Mongolia. Some previous workers hypothesized sexual dimorphism in the cranial shape of this taxon, using qualitative and ...
Farke, Andrew A. +3 more
core +16 more sources
New information on ornithopod dinosaurs from the Late Jurassic of Portugal [PDF]
Acta Palaeontologica Polonica, 2020 retaceous–Paleogene boundary. However, most of the attention has been given to derived forms (hadrosaurids). Herein, cranial and post-cranial ornithopod material from the Upper Jurassic Lourinhã Formation and housed at Museu da Lourinhã is described and ...
Filippo Maria Rotatori +2 more
doaj +1 more source
New perspectives on body size and shape evolution in dinosaurs. [PDF]
Biol Rev Camb Philos SocABSTRACT Diversity in the body shapes and sizes of dinosaurs was foundational to their widespread success during the Mesozoic era. The ability to quantify body size and form reliably is therefore critical to the study of dinosaur biology and evolution.
Dempsey M +4 more
europepmc +2 more sources
Papers 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
openalex +2 more sources
Diversity, 2023 An exceptional articulated skeleton of a new basal neornithischian dinosaur, Minimocursor phunoiensis gen. et sp. nov., was discovered in the Late Jurassic Phu Kradung Formation at the Phu Noi locality, Kalasin Province, Thailand, a highly productive non-
Sita Manitkoon +7 more
doaj +1 more source
A new ankylosaurine dinosaur from the Judith River Formation of Montana, USA, based on an exceptional skeleton with soft tissue preservation [PDF]
Royal Society Open Science, 2017 The terrestrial Judith River Formation of northern Montana was deposited over an approximately 4 Myr interval during the Campanian (Late Cretaceous). Despite having been prospected and collected continuously by palaeontologists for over a century, few ...
Victoria M. Arbour, David C. Evans
doaj +1 more source
Taphonomy and taxonomy of a juvenile lambeosaurine (Ornithischia: Hadrosauridae) bonebed from the late Campanian Wapiti Formation of northwestern Alberta, Canada [PDF]
PeerJ, 2021 Hadrosaurid (duck-billed) dinosaur bonebeds are exceedingly prevalent in upper Cretaceous (Campanian–Maastrichtian) strata from the Midwest of North America (especially Alberta, Canada, and Montana, U.S.A) but are less frequently documented from more ...
Brayden Holland +9 more
doaj +2 more sources
Jaw Mechanics in Basal Ceratopsia (Ornithischia, Dinosauria) [PDF]
The Anatomical Record, 2009 AbstractCeratopsian dinosaurs were a dominant group of herbivores in Cretaceous terrestrial ecosystems. We hypothesize that an understanding of the feeding system will provide important insight into the evolutionary success of these animals. The mandibular mechanics of eight genera of basal ceratopsians was examined to understand the variability in ...
Kyo Tanoue +3 more
openalex +4 more sources
, 2022 Ornithischia (Fig. 6: stem/branch 3) Definition adopted: The most inclusive clade that includes Iguanodon bernissartensis but neither Megalosaurus bucklandii nor Diplodocus carnegii (after Baron et al., 2017a). Characters in support: Horizontal or only gently arched premaxillary palate (Char.
Norman, David B +3 more
openaire +2 more sources