Results 11 to 20 of about 181 (88)

Asteroid impact, not volcanism, caused the end-Cretaceous dinosaur extinction [PDF]

Proc Natl Acad Sci U S A, 2020
The Cretaceous/Paleogene mass extinction, 66 Ma, included the demise of non-avian dinosaurs. Intense debate has focused on the relative roles of Deccan volcanism and the Chicxulub asteroid impact as kill mechanisms for this event. Here, we combine fossil-
Allison, P, Chiarenza, AA, Farnsworth, A, Lunt, D, Mannion, P, Morgan, J, Valdes, P   +6 more
core   +2 more sources

Postcranial skeletal anatomy of the holotype and referred specimens of Buitreraptor gonzalezorum Makovicky, Apesteguía and Agnolín 2005 (Theropoda, Dromaeosauridae), from the Late Cretaceous of Patagonia [PDF]

PeerJ, 2018
Here we provide a detailed description of the postcranial skeleton of the holotype and referred specimens of Buitreraptor gonzalezorum. This taxon was recovered as an unenlagiine dromaeosaurid in several recent phylogenetic studies and is the best ...
Agnolín, Agnolín, Alifanov, Allain, Alvarenga, Apesteguía, Apesteguía, Apesteguía, Balanoff, Barsbold, Barsbold, Baumel, Bonaparte, Bonaparte, Bonaparte, Brissón Egli, Britt, Britt, Brochu, Brusatte, Brusatte, Brusatte, Burch, Burnham, Burnham, Calvo, Candia Halupczok, Candia Halupczok, Candia Halupczok, Carrano, Carrano, Cerda, Chiappe, Chiappe, Chiappe, Chiappe, Chinsamy, Chinsamy-Turan, Clark, Clarke, Coddington, Colbert, Corbella, Csiki, Currie, Currie, Currie, Currie, Currie, DePalma, Elzanowski, Evans, Forster, Foth, Fowler, Francillon-Vieillot, Gao, Garrido, Gauthier, Gianechini, Gianechini, Gianechini, Gianechini, Gianechini, Goloboff, Grellet-Tinner, Griffin, Han, Hu, Hutchinson, Hwang, Hwang, Jasinoski, Ji, Kirkland, Kobayashi, Kobayashi, Lambe, Leanza, Longrich, Lü, Madsen, Madsen, Madsen, Makovicky, Makovicky, Makovicky, Makovicky, Makovicky, Makovicky, Makovicky, Makovicky, Martin, Martin, Matthew, Mayr, Motta, Motta, Norell, Norell, Norell, Norell, Norell, Norell, Novas, Novas, Novas, Novas, Novas, Novas, Novas, Novas, Osborn, Osborn, Osmólska, Osmólska, Ostrom, Ostrom, Ostrom, Ostrom, O’Connor, O’Connor, Paul, Pei, Pei, Perle, Perle, Porfiri, Rauhut, Rougier, Russell, Russell, Sander, Senter, Senter, Sereno, Shen, Shen, Spalletti, Stromer, Sues, Tsuihiji, Turner, Turner, Turner, Turner, Turner, Turner, Wellnhofer, Wellnhofer, Wellnhofer, Wilson, Xu, Xu, Xu, Xu, Xu, Xu, Xu, Xu, Xu, Xu, Xu, Xu, Xu, Xu, Xu, Xu, Zanno, Zanno, Zheng, Zhou, Zhou, Zhou, Zhou, Zhou   +175 more
core   +5 more sources

An Eudromaeosaurian Theropod from Lo Hueco (Upper Cretaceous. Central Spain)

Diversity, 2023
The Lo Hueco fossil site (Cuenca, Spain) is one of the most relevant localities for the study of Late Cretaceous continental vertebrate faunas from Europe.
Elisabete Malafaia, Fernando Escaso, Rodolfo A. Coria, Francisco Ortega   +3 more
doaj   +1 more source

Relative skull size evolution in Mesozoic archosauromorphs: potential drivers and morphological uniqueness of erythrosuchid archosauriforms

Palaeontology, Volume 65, Issue 3, May/June 2022., 2022
Abstract Little is known about the large‐scale evolutionary patterns of skull size relative to body size, and the possible drivers behind these patterns, in Archosauromorpha. For example, the large skulls of erythrosuchids, a group of non‐archosaurian archosauromorphs from the Early and Middle Triassic, and of theropod dinosaurs are regarded as ...
Jordan Bestwick, Pedro L. Godoy, Susannah C. R. Maidment, Martín D. Ezcurra, Mia Wroe, Thomas J. Raven, Joseph A. Bonsor, Richard J. Butler, Kenneth Angielczyk   +8 more
wiley   +1 more source

Bioerosion trace fossils on bones of the Cretaceous South American theropodBuitreraptor gonzalezorumMakovicky, Apesteguía and Agnolín, 2005 (Deinonychosauria) [PDF]

Historical Biology, 2015
The ichnological record provides valuable information on the lifestyle, behaviour, and other palaeobiological and palaeoecological aspects of the biota. Here, we describe an interesting case of bioerosion trace fossils in bones of Buitreraptor gonzalezorum Makovicky, Apesteguía and Agnolín, 2005, a deinonychosaurian theropod from the fossiliferous ...
Gianechini, Federico Abel, de Valais, Silvina   +1 more
openaire   +3 more sources

Novas evidências de possíveis Unenlagiinae (Deinonychosauria, Theropoda) na Bacia São Luís-Grajaú, Albiano–Cenomaniano do Estado do Maranhão, Brasil

Revista Brasileira de Paleontologia, 2022
New evidence of putative Unenlagiinae (Deinonychosauria, Theropoda) in the São Luís-Grajaú Basin, Albian–Cenomanian, State of Maranhão, Brazil. We studied an assemblage of teeth from Laje do Coringa, São Luís-Grajaú Basin, Alcântara Formation, State of Maranhão, Brazil. The collection sites are dated as Albian–Cenomanian.
Luiz Antonio Letizio, Reinaldo J. Bertini, Manuel Alfredo Medeiros   +2 more
openaire   +1 more source

Unenlagiid theropods: are they members of the Dromaeosauridae (Theropoda, Maniraptora)?

Anais da Academia Brasileira de Ciências, 2011
In the present paper we analyze the phylogenetic position of the derived Gondwanan theropod clade Unenlagiidae. Although this group has been frequently considered as deeply nested within Deinonychosauria and Dromaeosauridae, most of the features ...
Federico L. Agnolin, Fernando E. Novas
doaj   +1 more source

Unenlagiinae revisited: dromaeosaurid theropods from South América

Anais da Academia Brasileira de Ciências, 2011
Over the past two decades, the record of South American unenlagiine dromaeosaurids was substantially increased both in quantity as well as in quality of specimens.
Federico A. Gianechini, Sebastian Apesteguia   +1 more
doaj   +1 more source

Potential for Powered Flight Neared by Most Close Avialan Relatives, but Few Crossed Its Thresholds [PDF]

, 2020
Uncertainties in the phylogeny of birds (Avialae) and their closest relatives have impeded deeper understanding of early theropod flight. To help address this, we produced an updated evolutionary hypothesis through an automated analysis of the Theropod ...
Brusatte, Stephen L., Dececchi, T. Alexander, Goloboff, Pablo Augusto, Habib, Michael B., Kaye, Thomas G., Larsson, Hans C. E., Norell, Mark A., Pei, Rui, Pittman, Michael B., Xu, Xing   +9 more
core   +4 more sources

Body size as a driver of scavenging in theropod dinosaurs [PDF]

, 2016
This work was funded by the Earth and Natural Sciences Doctoral Studies Programme and the Higher Education Authority through the Programme for Research at Third Level Institutions, Cycle 5 (PRTLI‐5), and cofunded by the European Regional Development Fund
Healy, Kevin, Jackson, Andrew L, Kane, Adam, Ruxton, Graeme D   +3 more
core   +1 more source