Results 1 to 10 of about 70 (48)

Osteology of the unenlagiid theropod Neuquenraptor argentinus from the Late Cretaceous of Patagonia [PDF]

Acta Palaeontologica Polonica, 2017
Neuquenraptor argentinus was described as the first undoubted deinonychosaurian theropod from Gondwana. The only known specimen is represented by a fragmentary skeleton, including a nearly complete foot, coming from Late Cretaceous beds of Neuquén ...
Federico Brissón Egli, Alexis M. Aranciaga Rolando, Federico L. Agnolín, Fernando E. Novas   +3 more
doaj   +5 more sources

Anatomía comparada de los terópodos paravianos Unenlagiidae y sus implicancias en el origen de las aves [PDF]

, 2023
Paraves es el clado de dinosaurios que cuenta con mayor número de especies, ya que por un lado agrupa a terópodos no-avianos extintos como Troodon y Velociraptor, y por otro lado a las aves, únicos dinosaurios vivientes (Avialae: Dinosauria, Gauthier 1986), donde se cuentan más de 11.000 especies.
Motta, Matías Javier
openaire   +4 more sources

A New Specimen ofAustroraptor cabazaiNovas, Pol, Canale, Porfiri and Calvo, 2008 (Dinosauria, Theropoda, Unenlagiidae) from the Latest Cretaceous (Maastrichtian) of Río Negro, Argentina [PDF]

Ameghiniana, 2012
There were considerable differences in Late Cretaceous faunas of the Northern and Southern Hemispheres, although the differences were breaking down during Campanian and Maastrichtian times with the appearance of hadrosaurids in Antarctica and South America, and titanosaurids in North America.
Currie, Philip J., Paulina Carabajal, Ariana   +1 more
openaire   +5 more sources

Paravian Phylogeny and the Dinosaur-Bird Transition: An Overview [PDF]

Frontiers in Earth Science, 2019
Recent years witnessed the discovery of a great diversity of early birds as well as closely related non-avian theropods, which modified previous conceptions about the origin of birds and their flight. We here present a review of the taxonomic composition
Federico L. Agnolin, Federico L. Agnolin, Federico L. Agnolin, Matias J. Motta, Matias J. Motta, Federico Brissón Egli, Federico Brissón Egli, Gastón Lo Coco, Gastón Lo Coco, Fernando E. Novas, Fernando E. Novas   +10 more
doaj   +3 more sources

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

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   +3 more sources

Postcranial osteology of a new specimen of Buitreraptor gonzalezorum (Theropoda, Unenlagiidae)

Cretaceous Research, 2018
Abstract Buitreraptor gonzalezorum is a theropod dinosaur belonging to the clade Unenlagiidae. It is known by several specimens coming from the Upper Cretaceous of Northwestern Patagonia, Argentina. In spite of its completeness, only a preliminary description of its postcranial anatomy is available.
Novas, Fernando Emilio, Brissón Egli, Federico, Agnolin, Federico, Gianechini, Federico Abel, Cerda, Ignacio Alejandro   +4 more
core   +5 more sources

Comments on the morphology of basal paravian shoulder girdle: New data based on unenlagiid Theropods and Paleognath birds [PDF]

, 2021
In 1976 John Ostrom published an enlightening paper about the anatomical transformations in the shoulder girdle and forelimb elements along the origin of birds.
Agnolin, Federico, Brissón Egli, Federico, Lo Coco, Gastón Ernesto, Motta, Matias Javier, Novas, Fernando Emilio, Rozadilla, Sebastian   +5 more
core   +1 more source

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]

, 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
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Isolated theropod teeth associated with a sauropod skeleton from the Late Cretaceous Allen Formation of Río Negro, Patagonia, Argentina [PDF]

, 2021
The discovery of theropod shed teeth associated with sauropod remains is relatively common in Cretaceous deposits of Patagonia. However, only a handful of studies have thoroughly explored the phylogenetic affinities of the theropod dental material. Here,
Baiano, Mattia Antonio, Canale, Juan Ignacio, Díaz Martínez, Ignacio, Hendrickx, Christophe, Meso, Jorge Gustavo, Salgado, Leonardo   +5 more
core   +5 more sources

A large Megaraptoridae (Theropoda: Coelurosauria) from Upper Cretaceous (Maastrichtian) of Patagonia, Argentina [PDF]

, 2022
Megaraptora is a theropod clade known from former Gondwana landmasses and Asia. Most members of the clade are known from the Early to Late Cretaceous (Barremian–Santonian), with Maastrichtian megaraptorans known only from isolated and poorly informative ...
Agnolin, Federico, Aranciaga Rolando, Alexis Mauro, Manabe, Makoto, Motta, Matias Javier, Novas, Fernando Emilio, Tsuihiji, Takanobu   +5 more
core   +1 more source