Results 41 to 50 of about 634 (144)
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
Macroevolutionary trends in theropod dinosaur feeding mechanics [PDF]
, 2022 Theropod dinosaurs underwent some of the most remarkable dietary changes in vertebrate evolutionary history, shifting from ancestral carnivory to hypercarnivory and omnivory/herbivory, with some taxa eventually reverting to carnivory.
Butler, Richard +3 more
core +1 more source
Skeletal completeness of the non‐avian theropod dinosaur fossil record
Palaeontology, Volume 62, Issue 6, Page 951-981, November 2019., 2019 Abstract Non‐avian theropods were a highly successful clade of bipedal, predominantly carnivorous, dinosaurs. Their diversity and macroevolutionary patterns have been the subject of many studies. Changes in fossil specimen completeness through time and space can bias our understanding of macroevolution.
Daniel D. Cashmore +2 more
wiley +1 more source
Building a Bird: Musculoskeletal Modeling and Simulation of Wing-Assisted Incline Running during Avian Ontogeny [PDF]
, 2018 Flapping flight is the most power-demanding mode of locomotion, associated with a suite of anatomical specializations in extant adult birds. In contrast, many developing birds use their forelimbs to negotiate environments long before acquiring “flight ...
Ashley M. Heers +4 more
core +3 more sources
The geometry of taking flight: Limb morphometrics in Mesozoic theropods
Journal of Morphology, Volume 276, Issue 2, Page 152-166, February 2015., 2015 ABSTRACT Theropoda was one of the most successful dinosaurian clades during the Mesozoic and has remained a dominant component of faunas throughout the Cenozoic, with nearly 10,000 extant representatives. The discovery of Archaeopteryx provides evidence that avian theropods evolved at least 155 million years ago and that more than half of the tenure of
Brandon P. Hedrick +4 more
wiley +1 more source
Re-evaluation of the Haarlem Archaeopteryx and the radiation of maniraptoran theropod dinosaurs [PDF]
, 2017 Archaeopteryx is an iconic fossil that has long been pivotal for our understanding of the origin of birds. Remains of this important taxon have only been found in the Late Jurassic lithographic limestones of Bavaria, Germany.
Foth, Christian, Rauhut, Oliver W. M.
core +2 more sources
New data on the Dromaeosauridae (Dinosauria: Theropoda) from the Late Cretaceous of southern France
Bulletin de la Société Géologique de France, 2009 Abstract Since the first discovery of dromaeosaurid remains from the Late Cretaceous of southern France, two genera and species, Variraptor mechinorumLe Loeuff & Buffetaut, 1998, and Pyroraptor olympiusAllain & Taquet, 2000, have been erected. Their validity and possible synonymy have been debated.
Eric Buffetaut, Phornphen Chanthasit
openaire +1 more source
A bony-crested Jurassic dinosaur with evidence of iridescent plumage highlights complexity in early paravian evolution [PDF]
, 2018 The Jurassic Yanliao theropods have offered rare glimpses of the early paravian evolution and particularly of bird origins, but, with the exception of the bizarre scansoriopterygids, they have shown similar skeletal and integumentary morphologies.
Clarke, Julia A +9 more
core +3 more sources
The Anatomical Record, EarlyView.Abstract Tyrannosaurus is viewed as a model organism in vertebrate paleontology, with numerous studies analyzing its feeding biomechanics. Nonetheless, the evolution of this feeding performance has been under‐addressed in Tyrannosauroidea, especially in basal tyrannosauroids. Here we used muscle‐force reconstruction and finite element analysis (FEA) to
Evan Johnson‐Ransom +4 more
wiley +1 more source
Diet of bird‐like troodontid dinosaurs: synthesis of a contentious clade
Biological Reviews, EarlyView.ABSTRACT Troodontidae is a clade of small‐to medium‐sized maniraptoran theropods that mainly lived in Laurasia (modern Asia, North America and Europe) during the Jurassic and Cretaceous periods and are believed to have had a variety of diets. The uniqueness of troodontid teeth suggests that they diverged from the typical flesh‐based diet of non‐avian ...
Yui Chi Fan +2 more
wiley +1 more source