Results 1 to 10 of about 59 (56)

The predatory ecology of Deinonychus and the origin of flapping in birds. [PDF]

PLoS ONE, 2011
Most non-avian theropod dinosaurs are characterized by fearsome serrated teeth and sharp recurved claws. Interpretation of theropod predatory ecology is typically based on functional morphological analysis of these and other physical features.
Denver W Fowler, Elizabeth A Freedman, John B Scannella, Robert E Kambic   +3 more
doaj   +2 more sources

Morphological disparity and structural performance of the dromaeosaurid skull informs ecology and evolutionary history [PDF]

BMC Ecology and Evolution
Non-avialan theropod dinosaurs had diverse ecologies and varied skull morphologies. Previous studies of theropod cranial morphology mostly focused on higher-level taxa or characteristics associated with herbivory.
Yuen Ting Tse, Case Vincent Miller, Michael Pittman   +2 more
doaj   +2 more sources

The phylogenetic affinities of the bizarre Late Cretaceous Romanian theropod Balaur bondoc (Dinosauria, Maniraptora): dromaeosaurid or flightless bird? [PDF]

PeerJ, 2015
The exceptionally well-preserved Romanian dinosaur Balaur bondoc is the most complete theropod known to date from the Upper Cretaceous of Europe. Previous studies of this remarkable taxon have included its phylogenetic interpretation as an aberrant ...
Andrea Cau, Tom Brougham, Darren Naish
doaj   +3 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

Paravian Phylogeny and the Dinosaur-Bird Transition: An Overview

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   +1 more source