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The origin and early evolution of birds
There is no evidence for a major or mass extinction of birds at the end of the Cretaceous, nor for a sudden ‘bottleneck’ in diversity that fostered the early Tertiary origination of living bird ‘Orders’.
Sauropod dinosaur embryos from the Late Cretaceous of Patagonia
- L. Chiappe, R. Coria, L. Dingus, Frankie D. Jackson, A. Chinsamy, M. Fox
- Environmental Science, GeographyNature
- 19 November 1998
The first known unequivocal embryonic remains of sauropod dinosaurs—the only known non-avian dinosaur embryos from Gondwana—are described from a nesting ground in the Upper Cretaceous stage of Patagonia, Argentina and it is proposed that these specimens belong to the same sauroPod species.
A new close relative of Carnotaurus sastrei Bonaparte 1985 (Theropoda: Abelisauridae) from the Late Cretaceous of Patagonia
A nearly complete and articulatedskeleton of a large theropod from Auca Mahuevo, a PatagonianLate Cretaceous site famous for its abundant sauropod eggs andembryos, forms the basis for a new abelisaur species, Aucasaurus garridoi.
A nesting dinosaur
- M. Norell, James M. Clark, L. Chiappe, D. Dashzeveg
- Environmental Science, BiologyNature
- 1 December 1995
The specimen described here is the first preserved well enough to determine its precise relationship with the nest, and provides the strongest evidence yet for the presence of avian brooding behaviour in non-avian dinosaurs.
Anatomy and systematics of the Confuciusornithidae (Theropoda, Aves) from the late Mesozoic of northeastern China. Bulletin of the AMNH ; no. 242
The Anatomy of Confuciusornis sanctus, a Treatise on the Forms of Communication and Disorders of Communication, edited by David I. Dickinson, 2nd Ed.
A Theropod Dinosaur Embryo and the Affinities of the Flaming Cliffs Dinosaur Eggs
An embryonic skeleton of a nonavian theropod dinosaur was found preserved in an egg from Upper Cretaceous rocks in the Gobi Desert of Mongolia. Cranial features identify the embryo as a member of…
An oviraptorid skeleton from the late Cretaceous of Ukhaa Tolgod, Mongolia, preserved in an avianlike brooding position over an oviraptorid nest. American Museum novitates ; no. 3265
- James M. Clark, M. Norell, L. Chiappe, Mongolyn Shinzhlėkh Ukhaany Akademi.
- Environmental Science
The articulated postcranial skeleton of an oviraptorid dinosaur (Theropoda, Coelurosauria) from the Late Cretaceous Djadokhta Formation of Ukhaa Tolgod, Mongolia, is preserved overlying a nest. The…
THE MESOZOIC RADIATION OF BIRDS
A wealth of recent discoveries combined with new phylogenetic analyses have documented the divergence of a number of lineages by the beginning of the Cretaceous, providing insights into the evolutionary development of feathers and other important features of the avian flight system.
Dinosaur eggs and nesting behaviors: A paleobiological investigation
The skull of a relative of the stem-group bird Mononykus
The configuration of the temporal region of the skull and its articulation with the rostrum indicate the capability for prokinetic movement in which flexing occurs at the junction of the upper jaw and neurocranium, and support the idea that prokinesis preceded other types of avian intracranial kinesis.