Academic literature on the topic 'Dinosaur eggshells'

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Journal articles on the topic "Dinosaur eggshells"

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Yang, Tzu-Ruei, Ying-Hsuan Chen, Jasmina Wiemann, Beate Spiering, and P. Martin Sander. "Fossil eggshell cuticle elucidates dinosaur nesting ecology." PeerJ 6 (July 6, 2018): e5144. http://dx.doi.org/10.7717/peerj.5144.

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The cuticle layer consisting mainly of lipids and hydroxyapatite (HAp) atop the mineralized avian eggshell is a protective structure that prevents the egg from dehydration and microbial invasions. Previous ornithological studies have revealed that the cuticle layer is also involved in modulating the reflectance of eggshells in addition to pigments (protoporphyrin and biliverdin). Thus, the cuticle layer represents a crucial trait that delivers ecological signals. While present in most modern birds, direct evidence for cuticle preservation in stem birds and non-avian dinosaurs is yet missing. H
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Zelenitsky, Darla K., François Therrien, Kohei Tanaka, Philip J. Currie, and Christopher L. DeBuhr. "Latest Cretaceous eggshell assemblage from the Willow Creek Formation (upper Maastrichtian – lower Paleocene) of Alberta, Canada, reveals higher dinosaur diversity than represented by skeletal remains." Canadian Journal of Earth Sciences 54, no. 2 (2017): 134–40. http://dx.doi.org/10.1139/cjes-2016-0080.

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The Willow Creek Formation (upper Maastrichtian – lower Paleocene) of southwestern Alberta is a poorly fossiliferous formation that preserves a low end-Cretaceous dinosaur diversity compared with most correlative terrestrial deposits in the North American Western Interior. Although only three dinosaur taxa are known from skeletal remains (Tyrannosaurus rex, Hadrosauridae indet., and Leptoceratopsidae indet.), study of hundreds of dinosaur eggshells recovered from several sites in the formation reveals the presence of a more diverse dinosaur assemblage. Morphological and histological analyses o
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Amiot, Romain, Lina B. Golovneva, Pascal Godefroit, et al. "High-Latitude Dinosaur Nesting Strategies during the Latest Cretaceous in North-Eastern Russia." Diversity 15, no. 4 (2023): 565. http://dx.doi.org/10.3390/d15040565.

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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 reproductive behaviors. The high palaeolatitude of the locality (~75° N), as well as the cool near-polar climate, where summer temperatures only averaged 20 °C during the warmest month, dark near-freezing winters and egg incubation that could have lasted several months, raise questions about dinosaur reproductive strategies, particularly in terms of the
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Wiemann, Jasmina, Tzu-Ruei Yang, Philipp N. Sander, et al. "Dinosaur origin of egg color: oviraptors laid blue-green eggs." PeerJ 5 (August 29, 2017): e3706. http://dx.doi.org/10.7717/peerj.3706.

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Protoporphyrin (PP) and biliverdin (BV) give rise to the enormous diversity in avian egg coloration. Egg color serves several ecological purposes, including post-mating signaling and camouflage. Egg camouflage represents a major character of open-nesting birds which accomplish protection of their unhatched offspring against visually oriented predators by cryptic egg coloration. Cryptic coloration evolved to match the predominant shades of color found in the nesting environment. Such a selection pressure for the evolution of colored or cryptic eggs should be present in all open nesting birds an
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Voris, Jared T., Darla K. Zelenitsky, François Therrien, and Kohei Tanaka. "Dinosaur eggshells from the lower Maastrichtian St. Mary River Formation of southern Alberta, Canada." Canadian Journal of Earth Sciences 55, no. 3 (2018): 272–82. http://dx.doi.org/10.1139/cjes-2017-0195.

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North America is known for its rich uppermost Cretaceous record of dinosaur egg remains, although a notable fossil gap exists during the lower Maastrichtian. Here we describe a diverse dinosaur eggshell assemblage from the St. Mary River Formation of southern Alberta that, in conjunction with recently described eggs from the same formation in Montana, helps fill this gap and sheds light on the dinosaur diversity in this poorly fossiliferous formation. Three theropod eggshell types (Continuoolithus cf. C. canadensis, Montanoolithus cf. M. strongorum, and Prismatoolithus cf. P. levis) and one or
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Hechenleitner, E. Martín, Gerald Grellet-Tinner, Matthew Foley, Lucas E. Fiorelli, and Michael B. Thompson. "Micro-CT scan reveals an unexpected high-volume and interconnected pore network in a Cretaceous Sanagasta dinosaur eggshell." Journal of The Royal Society Interface 13, no. 116 (2016): 20160008. http://dx.doi.org/10.1098/rsif.2016.0008.

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The Cretaceous Sanagasta neosauropod nesting site (La Rioja, Argentina) was the first confirmed instance of extinct dinosaurs using geothermal-generated heat to incubate their eggs. The nesting strategy and hydrothermal activities at this site led to the conclusion that the surprisingly 7 mm thick-shelled eggs were adapted to harsh hydrothermal microenvironments. We used micro-CT scans in this study to obtain the first three-dimensional microcharacterization of these eggshells. Micro-CT-based analyses provide a robust assessment of gas conductance in fossil dinosaur eggshells with complex pore
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Hansen, Robin, and Paul Barrett. "Hiding in plain sight: the unexpected discovery of a historically interesting dinosaur egg in a mineralogy collection." Geological Curator 11, no. 8 (2023): 535–49. http://dx.doi.org/10.55468/gc1469.

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In 1883, an agate from central India, donated by Chas. Fraser Esq., was registered in the Mineral Collection of the Natural History Museum (NHM), London, as BM.58644. More recently, it was removed from storage to be exhibited publicly in the NHM’s Membership Rooms, due to its high aesthetic value. However, a serendipitous observation made during an international mineralogy fair led to the discovery that the spherical structure in which the agate had formed was, in fact, a dinosaur egg. The size, shape and other features of the egg suggest that it was laid by a titanosaurid sauropod and was par
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Dong, Zhi-Ming, and Philip J. Currie. "Protoceratopsian embryos from Inner Mongolia, People's Republic of China." Canadian Journal of Earth Sciences 30, no. 10 (1993): 2248–54. http://dx.doi.org/10.1139/e93-195.

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New protoceratopsid fossils from Bayan Mandahu include the smallest specimens of Protoceratops and Bagaceratops recovered to date. None of these specimens were found associated with dinosaur eggshells, but all are small enough to fit within any of the eggs that have been attributed to protoceratopsians. It is concluded that they represent embryonic dinosaurs. No specimens are complete, but together they allow a better understanding of the cranial anatomy of the embryos.The absence of embryos in the thousands of eggs collected from Cretaceous sediments of China and Mongolia may represent a taph
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Sarkar, A., S. K. Bhattacharya, and D. M. Mohabey. "Stable-isotope analyses of dinosaur eggshells: Paleoenvironmental implications." Geology 19, no. 11 (1991): 1068. http://dx.doi.org/10.1130/0091-7613(1991)019<1068:siaode>2.3.co;2.

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Schweitzer, M. H., L. Chiappe, A. C. Garrido, J. M. Lowenstein, and S. H. Pincus. "Molecular preservation in Late Cretaceous sauropod dinosaur eggshells." Proceedings of the Royal Society B: Biological Sciences 272, no. 1565 (2005): 775–84. http://dx.doi.org/10.1098/rspb.2004.2876.

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Dissertations / Theses on the topic "Dinosaur eggshells"

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Garcia, Sellés Albert. "Oological Record of Dinosaurs in South-Central Pyrenees (SW Europe): Parataxonomy, diversity and biostratigraphical implications." Doctoral thesis, Universitat de Barcelona, 2012. http://hdl.handle.net/10803/84108.

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Southern Pyrenees has provided an abundant fossil record of dinosaur eggs and eggshells. Historically, the oofamily Megaloolithidae has shown its predominance over any other group of fossil eggs in this region. In addition, this oofamily is world-wide distributed being represented by, at least, four oogenus and 20 oospeices. Considering that the eggshell is a high stable structure, this number of Megaloolithus‘s oospecies is too high for such a relatively short time-interval (Campanian to Maastrichtian; less than 7 My). The structural characters used to define these oospecies are critically re
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Books on the topic "Dinosaur eggshells"

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Khosla, Ashu, and Spencer G. Lucas. Late Cretaceous Dinosaur Eggs and Eggshells of Peninsular India. Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-56454-4.

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Lucas, Spencer G., and Ashu Khosla. Late Cretaceous Dinosaur Eggs and Eggshells of Peninsular India: Oospecies Diversity and Taphonomical, Palaeoenvironmental, Biostratigraphical and Palaeobiogeographical Inferences. Springer International Publishing AG, 2021.

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Lucas, Spencer G., and Ashu Khosla. Late Cretaceous Dinosaur Eggs and Eggshells of Peninsular India: Oospecies Diversity and Taphanomical, Palaeoenvironmental, Biostratigraphical and Palaeobiogeographical Inferences. Springer International Publishing AG, 2020.

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Book chapters on the topic "Dinosaur eggshells"

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Khosla, Ashu, and Spencer G. Lucas. "Introduction of Indian Late Cretaceous Dinosaur Eggs and Eggshells of Peninsular India." In Topics in Geobiology. Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-56454-4_1.

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Khosla, Ashu, and Spencer G. Lucas. "Geology and Stratigraphy of Dinosaur Eggs and Eggshell-Bearing Infra- and Intertrappean Beds of Peninsular India." In Topics in Geobiology. Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-56454-4_3.

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Conference papers on the topic "Dinosaur eggshells"

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Lazer, Kayla, Ian Stout, Grace Hetrick, Abigail Keebler, Edward Simpson, and Michael Wizevich. "PRESERVED INTERNAL MEMBRANES OF DINOSAUR EGGSHELL FRAGMENTS, UPPER JURASSIC MORRISON FORMATION, DALTON WELLS, UTAH." In GSA 2020 Connects Online. Geological Society of America, 2020. http://dx.doi.org/10.1130/abs/2020am-357344.

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