Results 41 to 50 of about 1,060 (183)

The Rhabdodontidae (Dinosauria, Ornithischia), an enigmatic dinosaur group endemic to the Late Cretaceous European Archipelago [PDF]

open access: yesFossil Record, 2023
The Rhabdodontidae was one of the most important dinosaur groups inhabiting the Late Cretaceous European Archipelago. Currently, the clade comprises nine species within six genera, which have been found in southern France, northern Spain, eastern Austria,
Felix J. Augustin   +2 more
doaj   +3 more sources

III.—Saurischia and Ornithischia [PDF]

open access: yesGeological Magazine, 1914
In 1888 the late Professor H. G. Seeley pointed out for the first time (Rep. Brit. Assoc. Adv. Sci., 1888, pp. 698–9) that Owens' order ‘Dinosauria’ should be divided into two great natural groups, especially on account of their pelvis. He called them Saurischia (=‘Theropoda’ + ‘Sauropoda’) and Ornithischia (=‘Orthopoda’).
openaire   +1 more source

Anatomy and cranial functional morphology of the small-bodied dinosaur Fruitadens haagarorum from the Upper Jurassic of the USA. [PDF]

open access: yes, 2012
Heterodontosaurids are an important but enigmatic and poorly understood early radiation of ornithischian dinosaurs. The late-surviving heterodontosaurid Fruitadens haagarorum from the Late Jurassic (early Tithonian) Morrison Formation of the western USA ...
Chiappe, Luis M.   +20 more
core   +1 more source

The vertebrate fauna from the stipite layers of the Grands Causses (Middle Jurassic, France)

open access: yesFrontiers in Ecology and Evolution, 2014
The stipites are Bathonian (Middle Jurassic) coals that formed in an everglades-like environment and are now exposed in the Grands Causses (southern France).
Fabien eKnoll   +3 more
doaj   +1 more source

Bone histology in Dysalotosaurus lettowvorbecki (Ornithischia: Iguanodontia)--variation, growth, and implications. [PDF]

open access: yesPLoS ONE, 2012
BackgroundDysalotosaurus lettowvorbecki is a small ornithopod dinosaur known from thousands of bones and several ontogenetic stages. It was found in a single locality within the Tendaguru Formation of southeastern Tanzania, possibly representing a single
Tom R Hübner
doaj   +1 more source

Limb-Bone Scaling Indicates Diverse Stance and Gait in Quadrupedal Ornithischian Dinosaurs [PDF]

open access: yes, 2012
Background The most primitive ornithischian dinosaurs were small bipeds, but quadrupedality evolved three times independently in the clade. The transition to quadrupedality from bipedal ancestors is rare in the history of terrestrial vertebrate ...
Maidment, SC   +4 more
core   +1 more source

Evolution of the axial skeleton of early dinosaurs and the role of meristic and homeotic processesEvolution of the axial skeleton of early dinosaurs and the role of meristic and homeotic processes [PDF]

open access: yesRoyal Society Open Science
Changes in the axial skeleton played an important role in dinosaur evolution, with some of the oldest dinosaurs showing evidence of sacralization events.
André O. Fonseca   +3 more
doaj   +1 more source

Integumentary structure and composition in an exceptionally well-preserved hadrosaur (Dinosauria: Ornithischia) [PDF]

open access: yesPeerJ, 2019
Preserved labile tissues (e.g., skin, muscle) in the fossil record of terrestrial vertebrates are increasingly becoming recognized as an important source of biological and taphonomic information.
Mauricio Barbi   +7 more
doaj   +2 more sources

Phylogeny, histology and inferred body size evolution in a new rhabdodontid dinosaur from the Late Cretaceous of Hungary. [PDF]

open access: yes, 2012
Rhabdodontid ornithopod dinosaurs are characteristic elements of Late Cretaceous European vertebrate faunas and were previously collected from lower Campanian to Maastrichtian continental deposits.
Weishampel, D. B.   +20 more
core   +2 more sources

Secondary cartilage revealed in a non-avian dinosaur embryo. [PDF]

open access: yesPLoS ONE, 2013
The skull and jaws of extant birds possess secondary cartilage, a tissue that arises after bone formation during embryonic development at articulations, ligamentous and muscular insertions.
Alida M Bailleul   +2 more
doaj   +1 more source

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