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-
Chiarenza AA +6 more
europepmc +3 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 ...
Gianechini FA +3 more
europepmc +6 more sources
Functional morphometric analysis of the furcula in mesozoic birds. [PDF]
PLoS One, 2012 The furcula displays enormous morphological and structural diversity. Acting as an important origin for flight muscles involved in the downstroke, the form of this element has been shown to vary with flight mode.
Close RA, Rayfield EJ.
europepmc +4 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 +3 more
doaj +1 more source
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 +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 +1 more
openaire +3 more sources
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 +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
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. +9 more
core +4 more sources
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 +1 more
doaj +1 more source