Results 41 to 50 of about 56,986 (267)
Anais da Academia Brasileira de Ciências, 2011 Gondwana landmasses have served as large-scale biogeographic Noah's Arks and Beached Viking Funeral Ships, as defined by McKenna. The latitudinal trajectories of selected Gondwana dinosaur localities were traced through time in order to evaluate their ...
Louis L. Jacobs +2 more
doaj +1 more source
Royal Society Open Science, 2022 Dinosaur evolution is marked by numerous independent shifts from bipedality to quadrupedality. Sauropodomorpha is one of the lineages that transitioned from small bipedal forms to graviportal quadrupeds, with an array of intermediate postural strategies ...
Antonio Ballell +2 more
doaj +1 more source
Dinosaur diversification rates were not in decline prior to the K-Pg boundary [PDF]
Royal Society Open Science, 2020 Determining the tempo and mode of non-avian dinosaur extinction is one of the most contentious issues in palaeobiology. Extensive disagreements remain over whether their extinction was catastrophic and geologically instantaneous or the culmination of ...
Joseph A. Bonsor +3 more
doaj +1 more source
Multiple dinosaur egg-shell occurrence in an Upper Cretaceous nesting site from Patagonia [PDF]
, 2010 The discovery of hundreds of megaloolithid-type egg-clutches (some including embryos of an indeterminate species of titanosaur sauropods) in several stratigraphical levels of the Late Cretaceous nesting site of Auca Mahuevo (Chiappe et al., 2005 ...
Chiappe, Luis M. +2 more
core +1 more source
The Anatomical Record, EarlyView.Abstract Dinosaurs evolved a unique respiratory system with air sacs that contributed to their evolutionary success. Postcranial skeletal pneumaticity (PSP) has been used to infer the presence of air sac systems in some fossil archosaurs. While unambiguous evidence of PSP is well documented in pterosaurs and post‐Carnian saurischians, it remains absent
Tito Aureliano +3 more
wiley +1 more source
Paleoneuroanatomy of the European lambeosaurine dinosaur Arenysaurus ardevoli [PDF]
, 2015 The neuroanatomy of hadrosaurid dinosaurs is well known from North America and Asia. In Europe only a few cranial remains have been recovered that include the braincase. Arenysaurus is the first European endocast for which the paleoneuroanatomy has been
Canudo, JI +3 more
core +15 more sources
Earth History and BiodiversityGuangxi Zhuang Autonomous Region is an important region for dinosaur fossil discoveries in southern China, but its Jurassic dinosaur record remains relatively sparse.
Lida Xing +7 more
doaj +1 more source
First dinosaur tracks from the Açu Formation, Potiguar Basin (mid-Cretaceous of Brazil)
Anais da Academia Brasileira de Ciências, 2021 We record a new ichnosite bearing dinosaur tracks from the mid-Cretaceous (Aptian? -Cenomanian) of Brazil. The Fazenda dos Pingos ichnosite is situated within a sandstone pavement of the Açu Formation (Açu 3 unit) from the Potiguar Basin in the State of ...
GIUSEPPE LEONARDI +2 more
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The Anatomical Record, EarlyView.Abstract In birds, the neural canal houses a variety of anatomical structures including the spinal cord, meninges, spinal vasculature, and respiratory diverticula. Among these, paramedullary diverticula and the extradural dorsal spinal vein may leave behind osteological correlates in the form of pneumatic foramina and fossae, and a bilobed geometry of ...
Jessie Atterholt +5 more
wiley +1 more source
Osteohistology reveals the smallest adult Jurassic sauropodomorph
Royal Society Open Science, 2023 The earliest sauropodomorphs were small omnivores (less than 10 kg) that first appeared in the Carnian. By the Hettangian, early branching sauropodomorphs (EBSMs) were globally distributed, had variable postures, and some attained large body masses ...
Kimberley E. J. Chapelle +2 more
doaj +1 more source