Preservação Excepcional de Biomateriais Não Mineralizados em Fósseis do Clado Avialae [PDF]
Anuário do Instituto de Geociências, 2021 Milhares de fosseis de aves primitivas e diversificadasda Era Mesozoica e Cenozoica tem sido descobertos ao redor do mundo. Destes, centenas de estudos encontraram preservacao excepcional de biomateriais mineralizados, permitindo ampliar o conhecimento acerca da sua ecologia e evolucao.
Everton Fernando Alves +1 more
openaire +1 more source
A new ornithurine from the Early Cretaceous of China sheds light on the evolution of early ecological and cranial diversity in birds [PDF]
PeerJ, 2016 Despite the increasing number of exceptional feathered fossils discovered in the Late Jurassic and Cretaceous of northeastern China, representatives of Ornithurae, a clade that includes comparatively-close relatives of crown clade Aves (extant birds) and
Jiandong Huang +5 more
doaj +2 more sources
BMC Biology, 2022 Background Birds are key indicator species in extant ecosystems, and thus we would expect extinct birds to provide insights into the nature of ancient ecosystems. However, many aspects of extinct bird ecology, particularly their diet, remain obscure. One
Case Vincent Miller +4 more
doaj +1 more source
A new paravian dinosaur from the Late Jurassic of North America supports a late acquisition of avian flight [PDF]
PeerJ, 2019 The last two decades have seen a remarkable increase in the known diversity of basal avialans and their paravian relatives. The lack of resolution in the relationships of these groups combined with attributing the behavior of specialized taxa to the base
Scott Hartman +5 more
doaj +2 more sources
Cautionary tales on the use of proxies to estimate body size and form of extinct animals. [PDF]
Ecol EvolReconstructing the body size and form of extinct animals is of vital importance to our understanding of macroevolution and palaeontology. This is often done using anatomical proxies where extinct species are known only from fragmentary remains. However, there are many limitations influencing the selection of proxy taxa that are frequently overlooked ...
Gayford JH +7 more
europepmc +2 more sources
Novel Quantification of Eggshell Surfaces in <i>Dromaius novaehollandiae</i> With Implications for the Fossil Eggshells of Oviraptorosauria (Dinosauria). [PDF]
Ecol EvolWe have developed a new, quantitative method of assessing the variation on paleosurfaces. This method uses functions from the molaR package of R, including new functions detailed here. This paper tests the functions on the eggshell surfaces of extant emu (Dromaius novaehollandiae) and fossil oviraptorosaur eggs of the ootaxon Macroelongatoolithus ...
Hedge J, Bender E, Zanno LE.
europepmc +2 more sources
Was dinosaurian physiology inherited by birds? Reconciling slow growth in archaeopteryx. [PDF]
PLoS ONE, 2009 Archaeopteryx is the oldest and most primitive known bird (Avialae). It is believed that the growth and energetic physiology of basalmost birds such as Archaeopteryx were inherited in their entirety from non-avialan dinosaurs.
Gregory M Erickson +6 more
doaj +1 more source
Against unifying homology concepts: Redirecting the debate
Journal of Morphology, Volume 284, Issue 7, July 2023., 2023 Against traditional attempts to theoretically unify the various homology definitions on offer, we put forward the alternative strategy of retaining what is distinctive in various homology conceptualizations as context‐specific research tools. While Lankester's evolutionary construal of homology keeps being misinterpreted, we uncover his mechanistic ...
Devin Y. Gouvêa, Ingo Brigandt
wiley +1 more source
Femoral specializations to locomotor habits in early archosauriforms
Journal of Anatomy, Volume 240, Issue 5, Page 867-892, May 2022., 2022 We studied femoral shape variation by applying 3D geometric morphometrics to a large sample of archosauriforms predominantly from the Late Triassic. We identified a set of anatomical features varying with locomotor mode (quadrupedal/bipedal) or body size.
Romain Pintore +3 more
wiley +1 more source