Results 21 to 30 of about 4,654 (162)
eLife, 2016 Birds display remarkable diversity in the distribution and morphology of scales and feathers on their feet, yet the genetic and developmental mechanisms governing this diversity remain unknown.
Eric T Domyan +13 more
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Morphogenetic mechanism of the acquisition of the dinosaur-type acetabulum [PDF]
Royal Society Open Science, 2018 Understanding morphological evolution in dinosaurs from a mechanistic viewpoint requires the elucidation of the morphogenesis that gave rise to derived dinosaurian traits, such as the perforated acetabulum. In the current study, we used embryos of extant
Shiro Egawa +3 more
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Royal Society Open Science, 2021 Carcharodontosauria is a group of medium to large-sized predatory theropods, distributed worldwide during the Cretaceous. These theropods were probably the apex predators of Asiamerica in the early Late Cretaceous prior to the ascent of tyrannosaurids ...
Kohei Tanaka +4 more
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Diversity, 2021 The Late Triassic (Norian) outcrops of the Malmros Klint Formation, Jameson Land (Greenland) have yielded numerous specimens of non-sauropod sauropodomorphs.
Victor Beccari +4 more
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New records of theropods from the latest Cretaceous of New Jersey and the Maastrichtian Appalachian fauna [PDF]
Royal Society Open Science, 2019 The faunal changes that occurred in the few million years before the Cretaceous–Palaeogene extinction are of much interest to vertebrate palaeontologists. Western North America preserves arguably the best fossil record from this time, whereas terrestrial
Chase Doran Brownstein
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High-Latitude Dinosaur Nesting Strategies during the Latest Cretaceous in North-Eastern Russia
Diversity, 2023 Dinosaur eggshell fragments attributed to the oofamilies Spheroolithidae and Prismatoolithidae and recovered from the latest Cretaceous Kakanaut Formation of North-eastern Russia (Chukotka) constitute one of the northernmost records of dinosaur ...
Romain Amiot +8 more
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A Preliminary Study on the Siphon Mechanism in Giraffe (Giraffa camelopardalis)
Animals, 2022 Adult giraffes reach heights of 4.5 m with a heart-to-head distance of over 2 m, making cranial blood supply challenging. Ultrasound confirmed that the giraffe jugular vein collapses during head movement from ground level to fully erect, negating the ...
Marna Suzanne van der Walt +4 more
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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
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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
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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
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